Various Ti framelock knives from my collection (some from the past but mostly from the present, listed regardless of size/price):
Spyderco K2, Drunken & Paysan, Nirvana, both of the all Ti Millies (plain & fluted), Southard, Spydie Chef, Swayback, Tighe Stick & Mantra 1/2.
ZT 0200/0300, 0452/0462, 0560/0562, 0620/0630, 0801, 0804, 0850, 0900 & 0920
Olamic Wayfarer and Rainmaker
Real Steel Megalodon (this is my favorite all Ti framelock folder and the one that I have carried the most)
CRKT Hi-Jinx Ti (Ltd Ed of 525)
There may be others that are or have been in my collection but this is all that I can recall at the moment but I'll add others to the list as they occur to me.
Many of these are very "large" all Ti folders w/blades between 3.75-4" long that still cost less than $450 (despite being discontinued) but if you are looking for something really big w/both sides in Ti, the Spyderco K2 Ti Folder can't be beat w/its 4.5" long CPM10V blade (and 5.5" handle and 10" overall length).
I've never been fond of the all Ti 0562 (or the all Ti 0450/0452) because it just looks too "plain" to me but if you're in the market for an all Ti ZT, IMO, the 0920 Les George collab looks far better to me in terms of both size and appearance than any other all Ti ZT ever made that I've seen/owned/handled b4: