LtdJorge parent
Yep, but seems like the discussion was around solid titanium, that's why I mentioned sheet titanium. I can't see how making the fame out of thin titanium with hard bends (like how computer cases are made of steel sheets, but on a small scale) would make it weigh more than the solid acetate version. Should also be much stronger.
The "solid" frame titanium glasses I'm wearing right now are 0.5mm thick. If you were to put a housing the same thickness around a 60x10mm cylinder you've got something about the weight of an acetate frame, with zero electronics inside. Add the electronics and you've got something heavier, just with titanium as the material.
I mean, the material is nice, but you're not making it light weight that way.