i think all Ti were outsourced to Sandvik or some other US company at the time.
The Ti Bolt was certainly made by TST (owned at that time by Sandvik Corp), but I'm not sure about the Titanium.
If the serial number 3787 on the dropout is the only serial it has, that would suggest not TST. Ti Bolts had TST serials as well as bullet-end stays. 3787 isn't a TST serial.
I have a record of a 1992 Team Comp serial number which is 3946, so that could be the same builder. I don't know who built Team Comps either, but I think it was either Rocky themselves or a contract builder reasonably close to Vancouver. Rocky-built numbers were also four numerics, but preceded by A for an Altitude or V for a Vertex.
[just to be awkward, a 1991 Team Comp had a Taiwan serial, but 3787 definitely isn't a Taiwan number, and I have been told that no builder in Taiwan was working in titanium at that time.]