In my mundane correspondence and basic transactions in life I don't announce via my title, email signature or otherwise:
My marital status
My sex
'My' pronouns
Any other form of protected characteristic.
If anyone else gives a bison's bum about this then this says more about them than me. Like hell am I going to get into any form of discussion or negotiation about it.
I also see no need to give a title simply for the privilege of ordering a parcel. It seems in most cases it's computer sites and their irritating drop-down menus that don't allow any form of opt-out. I genuinely don't see or hear of them outside the computer screen.
Insurance and mortgage transactions do ask for marital status, but I rarely see this in other contexts. Medical appointments now interact fairly generically on the basis of Given-Name plus Family-Name. Unless acting in a very formal professional capacity - a keynote or something along those lines - I don't remember the last time I was addressed as Dr Goose. To students, I'm 'Serafina', and in my profession it's increasingly common practice on early acquaintance to address someone as Dear Serafina (if I may). They would then sign off with their given name to return the courtesy.
I suspect titles will become as rare as writing longhand letters and sending them by snail mail. Times and cultures change.
On a separate note, those drop-down menus are a royal PITA. UK/GB are often listed differently and can be real nuisance to find, and as for the ones with birth dates where you have to go alllllllll the way back to find yours - and are depressed about how long ago that was - FGS get rid!