The sheet of Ti that pic of the material spec was taken off is still on the floor of my workshop.
Best way to weld it is in a chamber as Frits said, but thats a real bitch to handle.
The Jap factories used that method with a large motorized 3 jaw built into the floor to enable easy rotation and fusion with no filler rod.
You can weld it with a big gas lens, but you HAVE to back purge the inside or it will oxidize the inner weld surface and crack immediately.
The prototype Ti pipes I did for a couple of 500GP teams had 0.024" headers and tailcones with 0.032" for the rest.
This setup recovers more evenly the heat lost on the overun into corners, and as it also heats up quicker it makes top end faster as well.
Ive got a thing thats unique and new.To prove it I'll have the last laugh on you.Cause instead of one head I got two.And you know two heads are better than one.
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