very likely, though I assume they would have had a hard life on the trails at some point. I also thought titanium had a high fatigue life so are failures all due to the manufacturing process I wonder. Is it common for a tube to fail or is it more common that failure occurs at / near a welded joint. I have a titanium lynskey road bike and tbh, the life / strength of the carbon forks worry me more than the frame
However, going back to the original theme of the Enigma, they really should have just given him another frame rather than welding the crack and hoping it lasts longer than the remainder of the 10 year warranty