Katzman is sort of right, if you are machining in modern high speed CNC machining centers with spindle speeds in the hundreds to thousands of rpm or depth of
cut in the 0.1" or greater range, but clearly hand reaming a BB shell or chasing threads at 3-5 rpm with adequate lube is not going to raise the temp of the cutting
edge more than 3-5D F, probably less and quality HSS tooling is more than up to the task. OTOH Hillrider is right, US made, name brand Ti frame is going to have
had the BB faced and threading cleaned in the course of manufacture. Mainland chinese frames ??? who knows. Ti, even heat treated 6AL4V is not a super alloy
or usable as a cutting tool grade material.