The closest you'll get is the Topic Propertiess and Topic
Reference reports.
In the first, you can select just the one option, to show
links from each topic. The second shows links to each topic. At
least, you'd have a topic-to-topic inventory to start with.
The reports show current topic titles and filenames, however.
So you can't tell which Related Topics links contain an outdated
topic title.
And they don't distinguish among types of links, so a text
link will look the same on the report as a Related Topics link.
Maybe this would be a useful starting point, if you can spot
the Related Topics links among the rest.
Otherwise, as Rick suggested, you'd need to look in the
source code. Two hunks of code, at the end (or where the button is,
anyway) refer to the title as it was when you set it up, and the
current filename. One is Metadata; the other is <OBJECT
....../OBJECT>.
If you know precisely what the old title was, you can
find-and-replace globally.
Good luck
Harvey