diff --git a/src/aria/accordion/accordion.ts b/src/aria/accordion/accordion.ts
index f0d1eb730b65..0b21b144578f 100644
--- a/src/aria/accordion/accordion.ts
+++ b/src/aria/accordion/accordion.ts
@@ -95,7 +95,7 @@ export class AccordionPanel {
     '[attr.aria-controls]': '_pattern.controls()',
     '[attr.aria-disabled]': '_pattern.disabled()',
     '[attr.disabled]': 'hardDisabled() ? true : null',
-    '[attr.tabindex]': '_pattern.tabindex()',
+    '[attr.tabindex]': '_pattern.tabIndex()',
     '(keydown)': '_pattern.onKeydown($event)',
     '(pointerdown)': '_pattern.onPointerdown($event)',
     '(focusin)': '_pattern.onFocus($event)',
@@ -122,7 +122,7 @@ export class AccordionTrigger {
    *
    * TODO(ok7sai): Consider move this to UI patterns.
    */
-  readonly hardDisabled = computed(() => this._pattern.disabled() && this._pattern.tabindex() < 0);
+  readonly hardDisabled = computed(() => this._pattern.disabled() && this._pattern.tabIndex() < 0);
 
   /** The accordion panel pattern controlled by this trigger. This is set by AccordionGroup. */
   readonly accordionPanel: WritableSignal<AccordionPanelPattern | undefined> = signal(undefined);
diff --git a/src/aria/combobox/combobox.ts b/src/aria/combobox/combobox.ts
index e583db721c60..b901c88facdc 100644
--- a/src/aria/combobox/combobox.ts
+++ b/src/aria/combobox/combobox.ts
@@ -123,7 +123,7 @@ export class Combobox<V> {
     'role': 'combobox',
     '[value]': 'value()',
     '[attr.aria-expanded]': 'combobox._pattern.expanded()',
-    '[attr.aria-activedescendant]': 'combobox._pattern.activedescendant()',
+    '[attr.aria-activedescendant]': 'combobox._pattern.activeDescendant()',
     '[attr.aria-controls]': 'combobox._pattern.popupId()',
     '[attr.aria-haspopup]': 'combobox._pattern.hasPopup()',
     '[attr.aria-autocomplete]': 'combobox._pattern.autocomplete()',
diff --git a/src/aria/listbox/listbox.ts b/src/aria/listbox/listbox.ts
index 92ba46214060..ffedeba632bb 100644
--- a/src/aria/listbox/listbox.ts
+++ b/src/aria/listbox/listbox.ts
@@ -46,12 +46,12 @@ import {ComboboxPopup} from '../combobox';
     'role': 'listbox',
     'class': 'ng-listbox',
     '[attr.id]': 'id()',
-    '[attr.tabindex]': '_pattern.tabindex()',
+    '[attr.tabindex]': '_pattern.tabIndex()',
     '[attr.aria-readonly]': '_pattern.readonly()',
     '[attr.aria-disabled]': '_pattern.disabled()',
     '[attr.aria-orientation]': '_pattern.orientation()',
     '[attr.aria-multiselectable]': '_pattern.multi()',
-    '[attr.aria-activedescendant]': '_pattern.activedescendant()',
+    '[attr.aria-activedescendant]': '_pattern.activeDescendant()',
     '(keydown)': '_pattern.onKeydown($event)',
     '(pointerdown)': '_pattern.onPointerdown($event)',
     '(focusin)': 'onFocus()',
@@ -198,7 +198,7 @@ export class Listbox<V> {
     'class': 'ng-option',
     '[attr.data-active]': '_pattern.active()',
     '[attr.id]': '_pattern.id()',
-    '[attr.tabindex]': '_pattern.tabindex()',
+    '[attr.tabindex]': '_pattern.tabIndex()',
     '[attr.aria-selected]': '_pattern.selected()',
     '[attr.aria-disabled]': '_pattern.disabled()',
   },
diff --git a/src/aria/menu/menu.ts b/src/aria/menu/menu.ts
index 062a6487d208..4d7a74b65314 100644
--- a/src/aria/menu/menu.ts
+++ b/src/aria/menu/menu.ts
@@ -45,7 +45,7 @@ import {Directionality} from '@angular/cdk/bidi';
   exportAs: 'ngMenuTrigger',
   host: {
     'class': 'ng-menu-trigger',
-    '[attr.tabindex]': '_pattern.tabindex()',
+    '[attr.tabindex]': '_pattern.tabIndex()',
     '[attr.aria-haspopup]': '_pattern.hasPopup()',
     '[attr.aria-expanded]': '_pattern.expanded()',
     '[attr.aria-controls]': '_pattern.menu()?.id()',
@@ -340,7 +340,7 @@ export class MenuBar<V> {
     'role': 'menuitem',
     'class': 'ng-menu-item',
     '(focusin)': 'onFocusIn()',
-    '[attr.tabindex]': '_pattern.tabindex()',
+    '[attr.tabindex]': '_pattern.tabIndex()',
     '[attr.data-active]': '_pattern.isActive()',
     '[attr.aria-haspopup]': '_pattern.hasPopup()',
     '[attr.aria-expanded]': '_pattern.expanded()',
diff --git a/src/aria/private/accordion/accordion.ts b/src/aria/private/accordion/accordion.ts
index 0ba4286e3d73..5ce414af8df8 100644
--- a/src/aria/private/accordion/accordion.ts
+++ b/src/aria/private/accordion/accordion.ts
@@ -103,8 +103,8 @@ export class AccordionTriggerPattern {
   /** Id of the accordion panel controlled by the trigger. */
   controls = computed(() => this.inputs.accordionPanel()?.id());
 
-  /** The tabindex of the trigger. */
-  tabindex = computed(() => (this.inputs.accordionGroup().focusManager.isFocusable(this) ? 0 : -1));
+  /** The tab index of the trigger. */
+  tabIndex = computed(() => (this.inputs.accordionGroup().focusManager.isFocusable(this) ? 0 : -1));
 
   /** Whether the trigger is disabled. Disabling an accordion group disables all the triggers. */
   disabled = computed(() => this.inputs.disabled() || this.inputs.accordionGroup().disabled());
diff --git a/src/aria/private/behaviors/grid-focus/grid-focus.spec.ts b/src/aria/private/behaviors/grid-focus/grid-focus.spec.ts
index 91c75cd41649..414aa61c84b5 100644
--- a/src/aria/private/behaviors/grid-focus/grid-focus.spec.ts
+++ b/src/aria/private/behaviors/grid-focus/grid-focus.spec.ts
@@ -231,17 +231,17 @@ describe('GridFocus', () => {
   describe('getGridTabindex', () => {
     it('should return 0 if grid is disabled', () => {
       const {gridFocus} = setupGridFocus({disabled: signal(true)});
-      expect(gridFocus.getGridTabindex()).toBe(0);
+      expect(gridFocus.getGridTabIndex()).toBe(0);
     });
 
     it('should return -1 if focusMode is "roving" and grid is not disabled', () => {
       const {gridFocus} = setupGridFocus({focusMode: signal('roving')});
-      expect(gridFocus.getGridTabindex()).toBe(-1);
+      expect(gridFocus.getGridTabIndex()).toBe(-1);
     });
 
     it('should return 0 if focusMode is "activedescendant" and grid is not disabled', () => {
       const {gridFocus} = setupGridFocus({focusMode: signal('activedescendant')});
-      expect(gridFocus.getGridTabindex()).toBe(0);
+      expect(gridFocus.getGridTabIndex()).toBe(0);
     });
   });
 
@@ -252,9 +252,9 @@ describe('GridFocus', () => {
         numCols: 3,
         disabled: signal(true),
       });
-      expect(gridFocus.getCellTabindex(cells[0][0])).toBe(-1);
-      expect(gridFocus.getCellTabindex(cells[0][1])).toBe(-1);
-      expect(gridFocus.getCellTabindex(cells[0][2])).toBe(-1);
+      expect(gridFocus.getCellTabIndex(cells[0][0])).toBe(-1);
+      expect(gridFocus.getCellTabIndex(cells[0][1])).toBe(-1);
+      expect(gridFocus.getCellTabIndex(cells[0][2])).toBe(-1);
     });
 
     it('should return -1 if focusMode is "activedescendant"', () => {
@@ -263,9 +263,9 @@ describe('GridFocus', () => {
         numCols: 3,
         focusMode: signal('activedescendant'),
       });
-      expect(gridFocus.getCellTabindex(cells[0][0])).toBe(-1);
-      expect(gridFocus.getCellTabindex(cells[0][1])).toBe(-1);
-      expect(gridFocus.getCellTabindex(cells[0][2])).toBe(-1);
+      expect(gridFocus.getCellTabIndex(cells[0][0])).toBe(-1);
+      expect(gridFocus.getCellTabIndex(cells[0][1])).toBe(-1);
+      expect(gridFocus.getCellTabIndex(cells[0][2])).toBe(-1);
     });
 
     it('should return 0 if focusMode is "roving" and cell is the activeCell', () => {
@@ -275,9 +275,9 @@ describe('GridFocus', () => {
         focusMode: signal('roving'),
       });
 
-      expect(gridFocus.getCellTabindex(cells[0][0])).toBe(0);
-      expect(gridFocus.getCellTabindex(cells[0][1])).toBe(-1);
-      expect(gridFocus.getCellTabindex(cells[0][2])).toBe(-1);
+      expect(gridFocus.getCellTabIndex(cells[0][0])).toBe(0);
+      expect(gridFocus.getCellTabIndex(cells[0][1])).toBe(-1);
+      expect(gridFocus.getCellTabIndex(cells[0][2])).toBe(-1);
     });
   });
 
diff --git a/src/aria/private/behaviors/grid-focus/grid-focus.ts b/src/aria/private/behaviors/grid-focus/grid-focus.ts
index 49cec74330d9..508026eb9726 100644
--- a/src/aria/private/behaviors/grid-focus/grid-focus.ts
+++ b/src/aria/private/behaviors/grid-focus/grid-focus.ts
@@ -96,16 +96,16 @@ export class GridFocus<T extends GridFocusCell> {
     return gridCells.length === 0 || gridCells.every(row => row.every(cell => cell.disabled()));
   }
 
-  /** The tabindex for the grid container. */
-  getGridTabindex(): -1 | 0 {
+  /** The tab index for the grid container. */
+  getGridTabIndex(): -1 | 0 {
     if (this.isGridDisabled()) {
       return 0;
     }
     return this.inputs.focusMode() === 'activedescendant' ? 0 : -1;
   }
 
-  /** Returns the tabindex for the given grid cell cell. */
-  getCellTabindex(cell: T): -1 | 0 {
+  /** Returns the tab index for the given grid cell cell. */
+  getCellTabIndex(cell: T): -1 | 0 {
     if (this.isGridDisabled()) {
       return -1;
     }
diff --git a/src/aria/private/behaviors/grid/grid-focus.spec.ts b/src/aria/private/behaviors/grid/grid-focus.spec.ts
index f9e26bcdeb66..d6faeafdbadc 100644
--- a/src/aria/private/behaviors/grid/grid-focus.spec.ts
+++ b/src/aria/private/behaviors/grid/grid-focus.spec.ts
@@ -220,7 +220,7 @@ describe('GridFocus', () => {
 
       gridFocus.focusCell(cells[1][1]);
 
-      expect(gridFocus.getCellTabindex(cells[1][1])).toBe(0);
+      expect(gridFocus.getCellTabIndex(cells[1][1])).toBe(0);
     });
 
     it('should return -1 for inactive cells in roving mode', () => {
@@ -231,8 +231,8 @@ describe('GridFocus', () => {
 
       gridFocus.focusCell(cells[1][1]);
 
-      expect(gridFocus.getCellTabindex(cells[0][0])).toBe(-1);
-      expect(gridFocus.getCellTabindex(cells[2][2])).toBe(-1);
+      expect(gridFocus.getCellTabIndex(cells[0][0])).toBe(-1);
+      expect(gridFocus.getCellTabIndex(cells[2][2])).toBe(-1);
     });
 
     it('should return -1 for all cells in activedescendant mode', () => {
@@ -243,14 +243,14 @@ describe('GridFocus', () => {
 
       gridFocus.focusCell(cells[1][1]);
 
-      expect(gridFocus.getCellTabindex(cells[0][0])).toBe(-1);
-      expect(gridFocus.getCellTabindex(cells[1][1])).toBe(-1);
+      expect(gridFocus.getCellTabIndex(cells[0][0])).toBe(-1);
+      expect(gridFocus.getCellTabIndex(cells[1][1])).toBe(-1);
     });
 
     it('should return -1 for all cells when the grid is disabled', () => {
       const cells = createTestGrid(createGridA);
       const gridFocus = setupGridFocus(signal(cells), {disabled: signal(true)});
-      expect(gridFocus.getCellTabindex(cells[1][1])).toBe(-1);
+      expect(gridFocus.getCellTabIndex(cells[1][1])).toBe(-1);
     });
   });
 
diff --git a/src/aria/private/behaviors/grid/grid-focus.ts b/src/aria/private/behaviors/grid/grid-focus.ts
index fa89ea784cfa..18def18c0b79 100644
--- a/src/aria/private/behaviors/grid/grid-focus.ts
+++ b/src/aria/private/behaviors/grid/grid-focus.ts
@@ -95,7 +95,7 @@ export class GridFocus<T extends GridFocusCell> {
     return gridCells.length === 0 || gridCells.every(row => row.every(cell => cell.disabled()));
   });
 
-  /** The tabindex for the grid container. */
+  /** The tab index for the grid container. */
   readonly gridTabIndex = computed<-1 | 0>(() => {
     if (this.gridDisabled()) {
       return 0;
@@ -105,8 +105,8 @@ export class GridFocus<T extends GridFocusCell> {
 
   constructor(readonly inputs: GridFocusInputs & GridFocusDeps<T>) {}
 
-  /** Returns the tabindex for the given grid cell cell. */
-  getCellTabindex(cell: T): -1 | 0 {
+  /** Returns the tab index for the given grid cell cell. */
+  getCellTabIndex(cell: T): -1 | 0 {
     if (this.gridDisabled()) {
       return -1;
     }
diff --git a/src/aria/private/behaviors/grid/grid.spec.ts b/src/aria/private/behaviors/grid/grid.spec.ts
index 910e79ab5fb2..d78ed7ad05c9 100644
--- a/src/aria/private/behaviors/grid/grid.spec.ts
+++ b/src/aria/private/behaviors/grid/grid.spec.ts
@@ -74,7 +74,7 @@ describe('Grid', () => {
   });
 
   describe('cellTabIndex', () => {
-    it('should return the tabindex for a cell', () => {
+    it('should return the tab index for a cell', () => {
       const cells = createTestGrid(createGridA);
       const grid = setupGrid(signal(cells));
 
diff --git a/src/aria/private/behaviors/grid/grid.ts b/src/aria/private/behaviors/grid/grid.ts
index f6a2e46bab65..123171e61794 100644
--- a/src/aria/private/behaviors/grid/grid.ts
+++ b/src/aria/private/behaviors/grid/grid.ts
@@ -48,7 +48,7 @@ export class Grid<T extends GridCell> {
   /** The anchor point for range selection, linked to the active coordinates. */
   readonly selectionAnchor = linkedSignal<RowCol>(() => this.focusBehavior.activeCoords());
 
-  /** The `tabindex` for the grid container. */
+  /** The `tab index` for the grid container. */
   readonly gridTabIndex = computed(() => this.focusBehavior.gridTabIndex());
 
   /** Whether the grid is in a disabled state. */
@@ -84,9 +84,9 @@ export class Grid<T extends GridCell> {
     return index !== undefined ? index + 1 : undefined;
   }
 
-  /** Gets the `tabindex` for a given cell. */
+  /** Gets the `tab index` for a given cell. */
   cellTabIndex(cell: T): -1 | 0 {
-    return this.focusBehavior.getCellTabindex(cell);
+    return this.focusBehavior.getCellTabIndex(cell);
   }
 
   /** Navigates to the cell above the currently active cell. */
diff --git a/src/aria/private/behaviors/list-focus/list-focus.spec.ts b/src/aria/private/behaviors/list-focus/list-focus.spec.ts
index 676e396569ff..b6fa3c3c881b 100644
--- a/src/aria/private/behaviors/list-focus/list-focus.spec.ts
+++ b/src/aria/private/behaviors/list-focus/list-focus.spec.ts
@@ -51,22 +51,22 @@ describe('List Focus', () => {
       focusManager = getListFocus({focusMode: signal('roving')});
     });
 
-    it('should set the list tabindex to -1', () => {
-      expect(focusManager.getListTabindex()).toBe(-1);
+    it('should set the list   to -1', () => {
+      expect(focusManager.getListTabIndex()).toBe(-1);
     });
 
-    it('should set the activedescendant to undefined', () => {
+    it('should set the active descendant to undefined', () => {
       expect(focusManager.getActiveDescendant()).toBeUndefined();
     });
 
-    it('should set the tabindex based on the active index', () => {
+    it('should set the tab index based on the active index', () => {
       const items = focusManager.inputs.items() as TestItem[];
       focusManager.inputs.activeItem.set(focusManager.inputs.items()[2]);
-      expect(focusManager.getItemTabindex(items[0])).toBe(-1);
-      expect(focusManager.getItemTabindex(items[1])).toBe(-1);
-      expect(focusManager.getItemTabindex(items[2])).toBe(0);
-      expect(focusManager.getItemTabindex(items[3])).toBe(-1);
-      expect(focusManager.getItemTabindex(items[4])).toBe(-1);
+      expect(focusManager.getItemTabIndex(items[0])).toBe(-1);
+      expect(focusManager.getItemTabIndex(items[1])).toBe(-1);
+      expect(focusManager.getItemTabIndex(items[2])).toBe(0);
+      expect(focusManager.getItemTabIndex(items[3])).toBe(-1);
+      expect(focusManager.getItemTabIndex(items[4])).toBe(-1);
     });
   });
 
@@ -77,22 +77,22 @@ describe('List Focus', () => {
       focusManager = getListFocus({focusMode: signal('activedescendant')});
     });
 
-    it('should set the list tabindex to 0', () => {
-      expect(focusManager.getListTabindex()).toBe(0);
+    it('should set the list tab index to 0', () => {
+      expect(focusManager.getListTabIndex()).toBe(0);
     });
 
     it('should set the activedescendant to the active items id', () => {
       expect(focusManager.getActiveDescendant()).toBe(focusManager.inputs.items()[0].id());
     });
 
-    it('should set the tabindex of all items to -1', () => {
+    it('should set the tab index of all items to -1', () => {
       const items = focusManager.inputs.items() as TestItem[];
       focusManager.inputs.activeItem.set(focusManager.inputs.items()[0]);
-      expect(focusManager.getItemTabindex(items[0])).toBe(-1);
-      expect(focusManager.getItemTabindex(items[1])).toBe(-1);
-      expect(focusManager.getItemTabindex(items[2])).toBe(-1);
-      expect(focusManager.getItemTabindex(items[3])).toBe(-1);
-      expect(focusManager.getItemTabindex(items[4])).toBe(-1);
+      expect(focusManager.getItemTabIndex(items[0])).toBe(-1);
+      expect(focusManager.getItemTabIndex(items[1])).toBe(-1);
+      expect(focusManager.getItemTabIndex(items[2])).toBe(-1);
+      expect(focusManager.getItemTabIndex(items[3])).toBe(-1);
+      expect(focusManager.getItemTabIndex(items[4])).toBe(-1);
     });
 
     it('should update the activedescendant of the list when navigating', () => {
diff --git a/src/aria/private/behaviors/list-focus/list-focus.ts b/src/aria/private/behaviors/list-focus/list-focus.ts
index 39d208814f96..729103258758 100644
--- a/src/aria/private/behaviors/list-focus/list-focus.ts
+++ b/src/aria/private/behaviors/list-focus/list-focus.ts
@@ -82,16 +82,16 @@ export class ListFocus<T extends ListFocusItem> {
     return this.inputs.activeItem()?.id() ?? undefined;
   }
 
-  /** The tabindex for the list. */
-  getListTabindex(): -1 | 0 {
+  /** The tab index for the list. */
+  getListTabIndex(): -1 | 0 {
     if (this.isListDisabledFocusable()) {
       return 0;
     }
     return this.inputs.focusMode() === 'activedescendant' ? 0 : -1;
   }
 
-  /** Returns the tabindex for the given item. */
-  getItemTabindex(item: T): -1 | 0 {
+  /** Returns the tab index for the given item. */
+  getItemTabIndex(item: T): -1 | 0 {
     if (this.isListDisabledFocusable()) {
       return -1;
     }
diff --git a/src/aria/private/behaviors/list/list.spec.ts b/src/aria/private/behaviors/list/list.spec.ts
index 0ae24a73a078..e4421c2d10fb 100644
--- a/src/aria/private/behaviors/list/list.spec.ts
+++ b/src/aria/private/behaviors/list/list.spec.ts
@@ -76,36 +76,36 @@ describe('List Behavior', () => {
   }
 
   describe('with focusMode: "activedescendant"', () => {
-    it('should set the list tabindex to 0', () => {
+    it('should set the list tab index to 0', () => {
       const {list} = getDefaultPatterns({focusMode: signal('activedescendant')});
-      expect(list.tabindex()).toBe(0);
+      expect(list.tabIndex()).toBe(0);
     });
 
     it('should set the active descendant to the active item id', () => {
       const {list} = getDefaultPatterns({focusMode: signal('activedescendant')});
-      expect(list.activedescendant()).toBe('item-0');
+      expect(list.activeDescendant()).toBe('item-0');
       list.next();
-      expect(list.activedescendant()).toBe('item-1');
+      expect(list.activeDescendant()).toBe('item-1');
     });
 
-    it('should set item tabindex to -1', () => {
+    it('should set item tab index to -1', () => {
       const {list, items} = getDefaultPatterns({focusMode: signal('activedescendant')});
       expect(list.getItemTabindex(items[0])).toBe(-1);
     });
   });
 
   describe('with focusMode: "roving"', () => {
-    it('should set the list tabindex to -1', () => {
+    it('should set the list tab index to -1', () => {
       const {list} = getDefaultPatterns({focusMode: signal('roving')});
-      expect(list.tabindex()).toBe(-1);
+      expect(list.tabIndex()).toBe(-1);
     });
 
     it('should not set the active descendant', () => {
       const {list} = getDefaultPatterns({focusMode: signal('roving')});
-      expect(list.activedescendant()).toBeUndefined();
+      expect(list.activeDescendant()).toBeUndefined();
     });
 
-    it('should set the active item tabindex to 0 and others to -1', () => {
+    it('should set the active item tab index to 0 and others to -1', () => {
       const {list, items} = getDefaultPatterns({focusMode: signal('roving')});
       expect(list.getItemTabindex(items[0])).toBe(0);
       expect(list.getItemTabindex(items[1])).toBe(-1);
@@ -140,8 +140,8 @@ describe('List Behavior', () => {
       expect(list.inputs.value()).toEqual([]);
     });
 
-    it('should have a tabindex of 0', () => {
-      expect(list.tabindex()).toBe(0);
+    it('should have a tab index of 0', () => {
+      expect(list.tabIndex()).toBe(0);
     });
   });
 
@@ -171,7 +171,7 @@ describe('List Behavior', () => {
     });
 
     it('should have a tabindex of 0', () => {
-      expect(list.tabindex()).toBe(-1);
+      expect(list.tabIndex()).toBe(-1);
     });
   });
 
diff --git a/src/aria/private/behaviors/list/list.ts b/src/aria/private/behaviors/list/list.ts
index 81f6db0c1a41..447f792b5847 100644
--- a/src/aria/private/behaviors/list/list.ts
+++ b/src/aria/private/behaviors/list/list.ts
@@ -64,10 +64,10 @@ export class List<T extends ListItem<V>, V> {
   disabled = computed(() => this.focusBehavior.isListDisabled());
 
   /** The id of the current active item. */
-  activedescendant = computed(() => this.focusBehavior.getActiveDescendant());
+  activeDescendant = computed(() => this.focusBehavior.getActiveDescendant());
 
-  /** The tabindex of the list. */
-  tabindex = computed(() => this.focusBehavior.getListTabindex());
+  /** The tab index of the list. */
+  tabIndex = computed(() => this.focusBehavior.getListTabIndex());
 
   /** The index of the currently active item in the list. */
   activeIndex = computed(() => this.focusBehavior.activeIndex());
@@ -100,9 +100,9 @@ export class List<T extends ListItem<V>, V> {
     });
   }
 
-  /** Returns the tabindex for the given item. */
+  /** Returns the tab index for the given item. */
   getItemTabindex(item: T) {
-    return this.focusBehavior.getItemTabindex(item);
+    return this.focusBehavior.getItemTabIndex(item);
   }
 
   /** Navigates to the first option in the list. */
diff --git a/src/aria/private/combobox/combobox.ts b/src/aria/private/combobox/combobox.ts
index 2af80ffcfdab..c6c73c74abac 100644
--- a/src/aria/private/combobox/combobox.ts
+++ b/src/aria/private/combobox/combobox.ts
@@ -116,7 +116,7 @@ export class ComboboxPattern<T extends ListItem<V>, V> {
   expanded = signal(false);
 
   /** The ID of the active item in the combobox. */
-  activedescendant = computed(() => this.inputs.popupControls()?.activeId() ?? null);
+  activeDescendant = computed(() => this.inputs.popupControls()?.activeId() ?? null);
 
   /** The currently highlighted item in the combobox. */
   highlightedItem = signal<T | undefined>(undefined);
diff --git a/src/aria/private/grid/cell.ts b/src/aria/private/grid/cell.ts
index 4ab9c2b8ff49..05338ec3f206 100644
--- a/src/aria/private/grid/cell.ts
+++ b/src/aria/private/grid/cell.ts
@@ -82,7 +82,7 @@ export class GridCellPattern implements GridCell {
     this.inputs.grid().gridBehavior.cellTabIndex(this),
   );
 
-  /** The `tabindex` for the cell. If the cell contains a widget, the cell's tabindex is -1. */
+  /** The tab index for the cell. If the cell contains a widget, the cell's tab index is -1. */
   readonly tabIndex: SignalLike<-1 | 0> = computed(() =>
     this.inputs.widget() !== undefined ? -1 : this._tabIndex(),
   );
@@ -101,7 +101,7 @@ export class GridCellPattern implements GridCell {
     this.selectable = inputs.selectable;
   }
 
-  /** Gets the `tabindex` for the widget within the cell. */
+  /** Gets the tab index for the widget within the cell. */
   widgetTabIndex(): -1 | 0 {
     return this._tabIndex();
   }
diff --git a/src/aria/private/grid/widget.ts b/src/aria/private/grid/widget.ts
index e25688dcda5b..fbe55ef6619e 100644
--- a/src/aria/private/grid/widget.ts
+++ b/src/aria/private/grid/widget.ts
@@ -30,7 +30,7 @@ export class GridCellWidgetPattern {
   /** The html element that should receive focus. */
   readonly element: SignalLike<HTMLElement>;
 
-  /** The `tabindex` for the widget. */
+  /** The `tab index` for the widget. */
   readonly tabIndex: SignalLike<-1 | 0> = computed(() => this.inputs.cell().widgetTabIndex());
 
   /** Whether the widget is in an active state (i.e. its containing cell is active). */
diff --git a/src/aria/private/listbox/combobox-listbox.ts b/src/aria/private/listbox/combobox-listbox.ts
index b331de3c358e..f4e7fb47aaea 100644
--- a/src/aria/private/listbox/combobox-listbox.ts
+++ b/src/aria/private/listbox/combobox-listbox.ts
@@ -28,13 +28,13 @@ export class ComboboxListboxPattern<V>
   role = computed(() => 'listbox' as const);
 
   /** The id of the active (focused) item in the listbox. */
-  activeId = computed(() => this.listBehavior.activedescendant());
+  activeId = computed(() => this.listBehavior.activeDescendant());
 
   /** The list of options in the listbox. */
   items: SignalLike<OptionPattern<V>[]> = computed(() => this.inputs.items());
 
-  /** The tabindex for the listbox. Always -1 because the combobox handles focus. */
-  override tabindex: SignalLike<-1 | 0> = () => -1;
+  /** The tab index for the listbox. Always -1 because the combobox handles focus. */
+  override tabIndex: SignalLike<-1 | 0> = () => -1;
 
   constructor(override readonly inputs: ComboboxListboxInputs<V>) {
     if (inputs.combobox()) {
diff --git a/src/aria/private/listbox/listbox.ts b/src/aria/private/listbox/listbox.ts
index 5f5c034e4866..b4769c1ff061 100644
--- a/src/aria/private/listbox/listbox.ts
+++ b/src/aria/private/listbox/listbox.ts
@@ -34,11 +34,11 @@ export class ListboxPattern<V> {
   /** Whether the listbox is readonly. */
   readonly: SignalLike<boolean>;
 
-  /** The tabindex of the listbox. */
-  tabindex: SignalLike<-1 | 0> = computed(() => this.listBehavior.tabindex());
+  /** The tab index of the listbox. */
+  tabIndex: SignalLike<-1 | 0> = computed(() => this.listBehavior.tabIndex());
 
   /** The id of the current active item. */
-  activedescendant = computed(() => this.listBehavior.activedescendant());
+  activeDescendant = computed(() => this.listBehavior.activeDescendant());
 
   /** Whether multiple items in the list can be selected at once. */
   multi: SignalLike<boolean>;
diff --git a/src/aria/private/listbox/option.ts b/src/aria/private/listbox/option.ts
index 8ea16149d004..835090a002f4 100644
--- a/src/aria/private/listbox/option.ts
+++ b/src/aria/private/listbox/option.ts
@@ -53,8 +53,8 @@ export class OptionPattern<V> {
   /** A reference to the parent listbox. */
   listbox: SignalLike<ListboxPattern<V> | undefined>;
 
-  /** The tabindex of the option. */
-  tabindex = computed(() => this.listbox()?.listBehavior.getItemTabindex(this));
+  /** The tab index of the option. */
+  tabIndex = computed(() => this.listbox()?.listBehavior.getItemTabindex(this));
 
   /** The html element that should receive focus. */
   element: SignalLike<HTMLElement>;
diff --git a/src/aria/private/menu/menu.ts b/src/aria/private/menu/menu.ts
index e49dfa1e5dbc..db8cd421571d 100644
--- a/src/aria/private/menu/menu.ts
+++ b/src/aria/private/menu/menu.ts
@@ -515,8 +515,8 @@ export class MenuTriggerPattern<V> {
   /** The menu associated with the trigger. */
   menu: SignalLike<MenuPattern<V> | undefined>;
 
-  /** The tabindex of the menu trigger. */
-  tabindex = computed(() => (this.expanded() && this.menu()?.inputs.activeItem() ? -1 : 0));
+  /** The tab index of the menu trigger. */
+  tabIndex = computed(() => (this.expanded() && this.menu()?.inputs.activeItem() ? -1 : 0));
 
   /** Handles keyboard events for the menu trigger. */
   keydownManager = computed(() => {
@@ -607,8 +607,8 @@ export class MenuItemPattern<V> implements ListItem<V> {
   /** Whether the menu item is active. */
   isActive = computed(() => this.inputs.parent()?.inputs.activeItem() === this);
 
-  /** The tabindex of the menu item. */
-  tabindex = computed(() => {
+  /** The tab index of the menu item. */
+  tabIndex = computed(() => {
     if (this.submenu() && this.submenu()?.inputs.activeItem()) {
       return -1;
     }
diff --git a/src/aria/private/tabs/tabs.spec.ts b/src/aria/private/tabs/tabs.spec.ts
index 3ceb1f9388a9..ea541399f350 100644
--- a/src/aria/private/tabs/tabs.spec.ts
+++ b/src/aria/private/tabs/tabs.spec.ts
@@ -158,15 +158,15 @@ describe('Tabs Pattern', () => {
     expect(tabPanelPatterns[1].hidden()).toBeTrue();
   });
 
-  it('should set a tabpanel tabindex to 0 if the tab is selected.', () => {
+  it('should set a tabpanel tab index to 0 if the tab is selected.', () => {
     tabListInputs.value.set(['tab-1']);
-    expect(tabPatterns[0].tabindex()).toBe(0);
+    expect(tabPatterns[0].tabIndex()).toBe(0);
   });
 
-  it('should set a tabpanel tabindex to -1 if the tab is not selected.', () => {
+  it('should set a tabpanel tab index to -1 if the tab is not selected.', () => {
     tabListInputs.value.set(['tab-1']);
-    expect(tabPatterns[1].tabindex()).toBe(-1);
-    expect(tabPatterns[2].tabindex()).toBe(-1);
+    expect(tabPatterns[1].tabIndex()).toBe(-1);
+    expect(tabPatterns[2].tabIndex()).toBe(-1);
   });
 
   it('should set a tabpanel aria-labelledby pointing to its tab id.', () => {
diff --git a/src/aria/private/tabs/tabs.ts b/src/aria/private/tabs/tabs.ts
index 95f593009343..01943593a62d 100644
--- a/src/aria/private/tabs/tabs.ts
+++ b/src/aria/private/tabs/tabs.ts
@@ -70,8 +70,8 @@ export class TabPattern {
   /** Whether the tab is selected. */
   readonly selected = computed(() => !!this.inputs.tablist().inputs.value().includes(this.value()));
 
-  /** The tabindex of the tab. */
-  readonly tabindex = computed(() => this.inputs.tablist().listBehavior.getItemTabindex(this));
+  /** The tab index of the tab. */
+  readonly tabIndex = computed(() => this.inputs.tablist().listBehavior.getItemTabindex(this));
 
   /** The id of the tabpanel associated with the tab. */
   readonly controls = computed(() => this.inputs.tabpanel()?.id());
@@ -111,8 +111,8 @@ export class TabPanelPattern {
   /** Whether the tabpanel is hidden. */
   readonly hidden = computed(() => this.inputs.tab()?.expanded() === false);
 
-  /** The tabindex of this tabpanel. */
-  readonly tabindex = computed(() => (this.hidden() ? -1 : 0));
+  /** The tab index of this tabpanel. */
+  readonly tabIndex = computed(() => (this.hidden() ? -1 : 0));
 
   /** The aria-labelledby value for this tabpanel. */
   readonly labelledBy = computed(() =>
@@ -149,11 +149,11 @@ export class TabListPattern {
   /** Whether the tablist is disabled. */
   readonly disabled: SignalLike<boolean>;
 
-  /** The tabindex of the tablist. */
-  readonly tabindex = computed(() => this.listBehavior.tabindex());
+  /** The tab index of the tablist. */
+  readonly tabIndex = computed(() => this.listBehavior.tabIndex());
 
   /** The id of the current active tab. */
-  readonly activedescendant = computed(() => this.listBehavior.activedescendant());
+  readonly activeDescendant = computed(() => this.listBehavior.activeDescendant());
 
   /** Whether selection should follow focus. */
   readonly followFocus = computed(() => this.inputs.selectionMode() === 'follow');
diff --git a/src/aria/private/toolbar/toolbar-widget.ts b/src/aria/private/toolbar/toolbar-widget.ts
index e86247481968..ee7b329c594c 100644
--- a/src/aria/private/toolbar/toolbar-widget.ts
+++ b/src/aria/private/toolbar/toolbar-widget.ts
@@ -31,8 +31,8 @@ export class ToolbarWidgetPattern<V> implements ListItem<V> {
   /** A reference to the parent toolbar. */
   readonly toolbar: SignalLike<ToolbarPattern<V>>;
 
-  /** The tabindex of the widgdet. */
-  readonly tabindex = computed(() => this.toolbar().listBehavior.getItemTabindex(this));
+  /** The tab index of the widgdet. */
+  readonly tabIndex = computed(() => this.toolbar().listBehavior.getItemTabindex(this));
 
   /** The text used by the typeahead search. */
   readonly searchTerm = () => ''; // Unused because toolbar does not support typeahead.
diff --git a/src/aria/private/toolbar/toolbar.ts b/src/aria/private/toolbar/toolbar.ts
index ec4e9f2031bb..6228fbe47995 100644
--- a/src/aria/private/toolbar/toolbar.ts
+++ b/src/aria/private/toolbar/toolbar.ts
@@ -36,11 +36,11 @@ export class ToolbarPattern<V> {
   /** Whether the toolbar is disabled. */
   readonly disabled = computed(() => this.listBehavior.disabled());
 
-  /** The tabindex of the toolbar (if using activedescendant). */
-  readonly tabindex = computed(() => this.listBehavior.tabindex());
+  /** The tab index of the toolbar (if using activedescendant). */
+  readonly tabIndex = computed(() => this.listBehavior.tabIndex());
 
   /** The id of the current active widget (if using activedescendant). */
-  readonly activedescendant = computed(() => this.listBehavior.activedescendant());
+  readonly activeDescendant = computed(() => this.listBehavior.activeDescendant());
 
   /** The key used to navigate to the previous widget. */
   private readonly _prevKey = computed(() => {
diff --git a/src/aria/private/tree/combobox-tree.ts b/src/aria/private/tree/combobox-tree.ts
index 70fed29206c3..5e3953ce9baf 100644
--- a/src/aria/private/tree/combobox-tree.ts
+++ b/src/aria/private/tree/combobox-tree.ts
@@ -27,13 +27,13 @@ export class ComboboxTreePattern<V>
   role = () => 'tree' as const;
 
   /* The id of the active (focused) item in the tree. */
-  activeId = computed(() => this.listBehavior.activedescendant());
+  activeId = computed(() => this.listBehavior.activeDescendant());
 
   /** The list of items in the tree. */
   items = computed(() => this.inputs.allItems());
 
-  /** The tabindex for the tree. Always -1 because the combobox handles focus. */
-  override tabindex: SignalLike<-1 | 0> = () => -1;
+  /** The tab index for the tree. Always -1 because the combobox handles focus. */
+  override tabIndex: SignalLike<-1 | 0> = () => -1;
 
   constructor(override readonly inputs: ComboboxTreeInputs<V>) {
     if (inputs.combobox()) {
diff --git a/src/aria/private/tree/tree.spec.ts b/src/aria/private/tree/tree.spec.ts
index 16bd5fc53349..5507950a1cbc 100644
--- a/src/aria/private/tree/tree.spec.ts
+++ b/src/aria/private/tree/tree.spec.ts
@@ -282,10 +282,10 @@ describe('Tree Pattern', () => {
       expect(item1.active()).toBe(true);
     });
 
-    it('should correctly compute tabindex state', () => {
+    it('should correctly compute tab index state', () => {
       const {tree, allItems} = createTree(treeExample, treeInputs);
       const item0 = getItemByValue(allItems(), 'Item 0');
-      expect(item0.tabindex()).toBe(tree.listBehavior.getItemTabindex(item0));
+      expect(item0.tabIndex()).toBe(tree.listBehavior.getItemTabindex(item0));
     });
 
     it('should navigate next on ArrowDown (vertical)', () => {
diff --git a/src/aria/private/tree/tree.ts b/src/aria/private/tree/tree.ts
index 2b21c2ac9b27..b39024812695 100644
--- a/src/aria/private/tree/tree.ts
+++ b/src/aria/private/tree/tree.ts
@@ -93,8 +93,8 @@ export class TreeItemPattern<V> implements ListItem<V>, ExpansionItem {
   /** Whether the item is active. */
   readonly active = computed(() => this.tree().activeItem() === this);
 
-  /** The tabindex of the item. */
-  readonly tabindex = computed(() => this.tree().listBehavior.getItemTabindex(this));
+  /** The tab index of the item. */
+  readonly tabIndex = computed(() => this.tree().listBehavior.getItemTabindex(this));
 
   /** Whether the item is selected. */
   readonly selected: SignalLike<boolean | undefined> = computed(() => {
@@ -188,11 +188,11 @@ export class TreePattern<V> {
   /** The roow is always visible. */
   readonly visible = () => true;
 
-  /** The tabindex of the tree. */
-  readonly tabindex: SignalLike<-1 | 0> = computed(() => this.listBehavior.tabindex());
+  /** The tab index of the tree. */
+  readonly tabIndex: SignalLike<-1 | 0> = computed(() => this.listBehavior.tabIndex());
 
   /** The id of the current active item. */
-  readonly activedescendant = computed(() => this.listBehavior.activedescendant());
+  readonly activeDescendant = computed(() => this.listBehavior.activeDescendant());
 
   /** The direct children of the root (top-level tree items). */
   readonly children = computed(() =>
diff --git a/src/aria/tabs/tabs.ts b/src/aria/tabs/tabs.ts
index 11084d8adde7..9fc4bf5ff096 100644
--- a/src/aria/tabs/tabs.ts
+++ b/src/aria/tabs/tabs.ts
@@ -125,10 +125,10 @@ export class Tabs {
   host: {
     'role': 'tablist',
     'class': 'ng-tablist',
-    '[attr.tabindex]': '_pattern.tabindex()',
+    '[attr.tabindex]': '_pattern.tabIndex()',
     '[attr.aria-disabled]': '_pattern.disabled()',
     '[attr.aria-orientation]': '_pattern.orientation()',
-    '[attr.aria-activedescendant]': '_pattern.activedescendant()',
+    '[attr.aria-activedescendant]': '_pattern.activeDescendant()',
     '(keydown)': '_pattern.onKeydown($event)',
     '(pointerdown)': '_pattern.onPointerdown($event)',
     '(focusin)': 'onFocus()',
@@ -232,7 +232,7 @@ export class TabList implements OnInit, OnDestroy {
     'class': 'ng-tab',
     '[attr.data-active]': '_pattern.active()',
     '[attr.id]': '_pattern.id()',
-    '[attr.tabindex]': '_pattern.tabindex()',
+    '[attr.tabindex]': '_pattern.tabIndex()',
     '[attr.aria-selected]': '_pattern.selected()',
     '[attr.aria-disabled]': '_pattern.disabled()',
     '[attr.aria-controls]': '_pattern.controls()',
@@ -301,7 +301,7 @@ export class Tab implements HasElement, OnInit, OnDestroy {
     'role': 'tabpanel',
     'class': 'ng-tabpanel',
     '[attr.id]': '_pattern.id()',
-    '[attr.tabindex]': '_pattern.tabindex()',
+    '[attr.tabindex]': '_pattern.tabIndex()',
     '[attr.inert]': '_pattern.hidden() ? true : null',
     '[attr.aria-labelledby]': '_pattern.labelledBy()',
   },
diff --git a/src/aria/toolbar/toolbar.ts b/src/aria/toolbar/toolbar.ts
index 8df53db3f665..027bef21cfb8 100644
--- a/src/aria/toolbar/toolbar.ts
+++ b/src/aria/toolbar/toolbar.ts
@@ -65,7 +65,7 @@ function sortDirectives(a: HasElement, b: HasElement) {
   host: {
     'role': 'toolbar',
     'class': 'ng-toolbar',
-    '[attr.tabindex]': '_pattern.tabindex()',
+    '[attr.tabindex]': '_pattern.tabIndex()',
     '[attr.aria-disabled]': '_pattern.disabled()',
     '[attr.aria-orientation]': '_pattern.orientation()',
     '(keydown)': '_pattern.onKeydown($event)',
@@ -170,7 +170,7 @@ export class Toolbar<V> {
   host: {
     'class': 'ng-toolbar-widget',
     '[attr.data-active]': '_pattern.active()',
-    '[attr.tabindex]': '_pattern.tabindex()',
+    '[attr.tabindex]': '_pattern.tabIndex()',
     '[attr.inert]': 'hardDisabled() ? true : null',
     '[attr.disabled]': 'hardDisabled() ? true : null',
     '[attr.aria-disabled]': '_pattern.disabled()',
diff --git a/src/aria/tree/tree.ts b/src/aria/tree/tree.ts
index 867f12a0d9e6..6e9d679018a8 100644
--- a/src/aria/tree/tree.ts
+++ b/src/aria/tree/tree.ts
@@ -77,8 +77,8 @@ function sortDirectives(a: HasElement, b: HasElement) {
     '[attr.aria-orientation]': '_pattern.orientation()',
     '[attr.aria-multiselectable]': '_pattern.multi()',
     '[attr.aria-disabled]': '_pattern.disabled()',
-    '[attr.aria-activedescendant]': '_pattern.activedescendant()',
-    '[tabindex]': '_pattern.tabindex()',
+    '[attr.aria-activedescendant]': '_pattern.activeDescendant()',
+    '[tabindex]': '_pattern.tabIndex()',
     '(keydown)': '_pattern.onKeydown($event)',
     '(pointerdown)': '_pattern.onPointerdown($event)',
     '(focusin)': 'onFocus()',
@@ -230,7 +230,7 @@ export class Tree<V> {
     '[attr.aria-level]': '_pattern.level()',
     '[attr.aria-setsize]': '_pattern.setsize()',
     '[attr.aria-posinset]': '_pattern.posinset()',
-    '[attr.tabindex]': '_pattern.tabindex()',
+    '[attr.tabindex]': '_pattern.tabIndex()',
   },
 })
 export class TreeItem<V> extends DeferredContentAware implements OnInit, OnDestroy, HasElement {