There were a number of titanium frames built by "not in the bike business" companies over the years. Starting from the first (?) Teledyne, and including companies like Sumitomo.
Some of us may recognize a maker based of photos, especially showing details like the seat lug cluster, bottom bracket, chainstays and rear dropouts.
You should focus more on it's condition, ie. any hint of crash damage, than the brand, but if curious post photos here, or probably better on C&V.
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