From what i know there isn't a standard way to do this in Magento.
Best chance at doing this fairly quickly, is to probably use regex. You could use it in your IDE to search for all "a" tags without title attributes.
My regex is not 100%, but this looks like it should work:
else you could google some other regular expressions that will do what you need it to do.
You could also use terminal grep|find with similar regex.
If you are any good at jQuery or Prototype, you could write something simple like:
But ye, regular expressions is your best bet.
FYI: Just tried the regex in PHPStorm and works like a charm.