a titanium fullsus is nothing else but different or exclusive – there is zero advantage over aluminum, but still it is cool.
As for Kingdom, they work with XACD who will build anything you want. A full sus would cost you far less than half of Kingdom’s price, as these guys add quite a massive upcharge.
Have bought a frame from Kingdom, a slightly used prototype. The welds are ok, the frame is on the heavy side and it was very much prototype – brake tabs were out of line, am using 3mm washers between rotor and hub.
RD hanger is almost 8mm out of line…
Anyway, the frame needed some 9 labour hours, now it is fine. But, frankly, not worth it except the coolness factor.
If you really want a 650b fullsus, buy it from someone who digs fullsus technology and buy aluminium.
my2cents