To add a wrinkle here:
As far as the Kindle itself, there are 2 Title fields that it appears to read. There is the Title field itself and there is "UpdatedTitle" which is exth record 503.
As far as I can tell, if UpdatedTitle is present, the Kindle reads that and disregards the Title.
I'm not sure how Calibre handles this but I expect it changes the UpdatedTitle where relevant.
If, however, you use something like Mobi2mobi to edit the fields directly, you'll need to check for the presence of UpdatedTitle yourself.
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