https://meta.codidact.com/posts/282459
Also https://meta.codidact.com/posts/290349

When this came up again in a duplicate (https://meta.codidact.com/posts/284483), I suggested:

I think it's reasonable for the person who created the thread to be able to edit the title so long as the only comments are from that user. As soon as there's a comment from someone else, though, there's the chance that changing the thread title can affect context for those comments (or even can be changed destructively), and -- unlike with posts -- readers can't audit these edits.

At this writing that suggestion is +6/-0. People make typos in thread titles, or don't realize that the default title is an initial substring. We should let them edit so long as they're only affecting their own comments.

We should log the edit, just in case thread titles are used for abusive purposes and we need to be able to review.

Update: allow anybody involved in the thread to rename it, and add an auto-comment to the thread recording the change: something like "title changed from (old) to (new) by (user)". This comment is owned by System, not the person making the change, so only mods can delete it.

Curators have the "tools" menu, which other users don't have. This means either giving them the "tools" menu (with just the one option) or adding an 'edit title" link somewhere.