Don't know about Titanium, but all my Steinberger basses have regular zero frets. I have heard that Gibson's regular zero frets were wearing out something fierce ... too much bending?!
Must have been a bear to finish that fret!! I have worked with titanium before, and you should just call it Tool Killer Metal. Most folks just use Stainless Steel, much harder than standard frets, but not crazy hard like Ti. All I can say is ... it better be set up right, or it will be crazy to fine tune.
Edit: the standard zero nut says Cryogenically Treated Brass, so this might be an aftermarket part. Still Ti is overkill. And for guitar, my favorite nut is TUSQ, but cut my first bone nut recently (in my Amusement Journal) and like it, too!