I give tons of credit for designing and fabricating that bike. Most people have absolutely no idea how difficult it is to take on a project like this and see it through successfully. Props. But...those welds are contaminated, embrittled and the frame is going to break. Welded titanium should show no color at all or at most a light straw brownish color if it was kept sufficiently clean and this bike doesn't appear to have been cleaned properly nor has it been welded properly. I wonder if the frame was purged during welding? I sincerely hope that the first failure is a minor one. FWIW - I make my living welding and fabricating titanium.