There are no title elements in <title>. They're in .
$ cat titles.html
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<HEAD>
<TITLE>Test stuff</TITLE>
<TITLE>As if one title isn't enough</TITLE>
</HEAD>
<BODY>
<P>This is my paragraph</P>
</BODY>
</HTML>
$ tidy -q -e titles.html
line 2 column 5 - Warning: too many title elements in <title>