Unobtanium.....
From what limited info I have read. Its a high strength alloy developed by the USSR for aerospace development. The cold war ended and S&W ended up with the technology...dah? Anyway,
it handles shock loads produced by handguns well, is light and
strong. It is designed to handle heat cycling and be "shock absorbing".....flexes" to a minor degree while remaining very
strong. I could be wrong, not a metalurgist, but think Titanium is
harder and more brittle...not handling the "shock" as well as Scandium. Thats it....
Shoot well