so the one tie I had that needed some serious help, a Canali thick woven silk job, I couldn't get the wrinkles out despite the ideas posted here. Light ironing, heavy steaming...lots of long hanging...would not fix. Rethrifted.
The other tie with a couple weird creases at the point, a Bloomingdalies printed silk...good to go
Lesson: Bad wrinkles: Don't bother. Not so bad? take your shot.