My son's Kuwait Airways ticket from India to Italy has the wrong title: 'Ms' instead of 'Mr'. Contacting the airline, they have included a remark in their system to read 'Ms' as 'Mr'. However, as the ticket/boarding pass will still mention 'Ms', will this be an issue at the immigration counter at the airport?
they have included a remark in their system to read 'Ms' as 'Mr'.
That's it then, don't worry. And checking for titles on a ticket is not the job of an immigration officer, it is the job of check-in staff and they will see a note by their office.
Many airlines do not allow any changes to names after a ticket has been issued but if you request them for such changes due to a mistake they indicate those in remarks for check-in staff. That's exactly what they did for you and that's good enough, don't worry.
I have made this mistake multiple times wih different airlines and those remarks have always helped. I've never been questioned about those.
There is no issue with this on immigration counter as titles are optional everywhere.
You would note that your son's passport doesn't have a title or salutation, that should tell you how important it is to get this right.
I would be more worried about the transit through Kuwait. The airport is undergoing construction so I hope your son is able to find seating as the airport gets very crowded. A new temporary terminal and a new airport are both under construction.
Relax, and have a safe trip.
From personal experience, this absolutely didn't matter for me, when some airline a while ago (can't remember which one now, possibly Emirates or Egypt Air) issued a ticket to me with "Mrs" on it instead of "Mr". I contacted them at the time and they told me not to worry.
When I arrived at the airport, nobody even remotely bothered to check the title/salutation. The name match fully against my passport - and that was sufficient.
When you arrive at the passport or customs control, you don't need your boarding pass nor ticket, so this shouldn't matter again.