You could, but you don't want to know how much a one-off set of Ti tips will cost.
Actually, I'll tell you anyway. You would have to do a group buy because, for example, I had this quoted for a set of 4 tips for the GTRs (in FULL TITANIUM), and that comes out to 5k. Seriously ridiculous. A set like that would be unique in the world though. (Like my Jeepra.
) You could just get a Ti outer though. That was around 1.2k iirc (again, for the GTR), and still pretty ridic.