In Richard Riley wrote:

Best of all worlds - .012 titanium and 1/8 fiberfrax. Hard to find,
but it's out there. Any alloy will do. Ti will burn, but it takes
something like 5000 degrees to light it, and you're not going to get
that in an engine fire.

My father in law once set a piece of titanium on fire that he was
machining in a lathe.

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Del Rawlins-
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