The Spanish loco that was once British Airways still betrays its heritage by offering its passengers a wide choice of titles. Over the years, decades even, I have tried nearly all of them; Sir, Rt Hon, Lord, Baron, Viscount, Prof, Rabbi (not very plausibly), Rev.
I avoid Dr, although I know that there are those non-medical doctors who invite derision by using the title, in case of the dreaded call; "Is there a Doctor on Board?".
I'm please to be able to report that it has never made one jot of difference to the way I was treated on the ground or in the air, demonstrating that most people regard titles as ridiculous nonsense, as I do.