What alloy of Ti are you using?My desktop jockey skills are being inhibited by my wife telling me to mow the lawn in the background, but I keep coming up with 4.8 x10^-6 inch per inch per degree F. which should be .000048. If I'm wrong let me know, but I saw that a few different places.
I'm far from a metallurgist, but I am flutes deep in Titanium almost every day. You seem pretty knowledgeable, if you have any opinions on the strength of 7075 vs 6061 aluminum shoot me a pm, as I make tripod adapters for rifle using 7075.
7075 is stronger than 6061. 6061 is a lil easier to cut.