My main worry is warpage due to uneven heat.
What is the coef of thermal expansion for ti? The SR71 had
a problem
with that as I recall.

Paul Lamar

Paul, The CLE of pure Ti is 4.9 x 10-6th/deg F. That expansion rate 
would place it just less than carbon steel. (6.0 x 10-6/deg F) 6061-T6 
is approx 1.2 X 10-5th/deg F. The SR-71 didn't have a problem with the Ti. 
It was the huge delta T. From -30°F @ 50k ft subsonic to +400-600°F at Mach 3+ (way+)
The 71 is a big plane, a lot of surface to grow at those temps! Bill Jepson

 
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