In the film Iron Man 1, is it said at the beginning of the film that Tony Stark has a PhD in Physics. Is it ever mentionned more precisely in what field he had this PhD ? Is it related with JARVIS or his Iron Man suit ?
IIRC, in the movie they mention he went to MIT (in the magazine/newspaper montage?) but nothing beyond that
Is his degree related directly to his inventions? I don't think so. In the movie the MIT story had him next to a robot; but they didn't specifically say Robotics engineer or AI engineer. His degree seems to be more "general"
In the comics: he was a boy genius, went to MIT at age 15 and had masters degrees in electrical engineering and physics. Nothing specific beyond that
In comic book canon, I have seen a reprinted and posted page where Stark is in a private meeting with Captain America, Dr. Reed Richards, Dr. Stephen Strange and Professor Xavier.
Drs. Richards and Strange address each other with honorifics. Stark then points out that he has three doctorates. There's no discussion of the fields in which he studied though.