Titanium forks are not common. One thing I would be very careful about is that you know these forks were welded up by someone really good at welding titanium. A fork is a place where you really don't want to have a failure. (Trust me - I know first hand.)

The characteristics of titanium, if done right, should make a sweet fork. I haven't ridden one but have thought about it for years. The framebuilder who has done a lot of work for me has made a few. He and others have made ti forks as triangular trusses with tubes coming from the hub to the front of the stem. You lose stem adjustibilty, but what a light fork! You want a fork that is larger diameter than a steel fork if you stay conventional to get enough stiffness since the titanium is half as stiff as a material.

Ben