wrote in message
...
On May 9, 8:04 pm, "Ed Huntress" wrote:

Not that I know of, Dan. Titanium has a reputation for not work-hardening
very much. It's worth checking out, in the machining context, but I'm
pretty
sure that's the situation in general.

Titanium can be miserable to machine -- I remember doing some machining
of
it back in the mid-'70s -- but my recollection is that it was more tough
and
gummy than hard. But that's pretty far back in memory for me.

--
Ed Huntress

Hmmm. I did a little looking on the internet and found sites that
said Titanium work hardens about like 1020 steel, that is not a lot.
But they followed this with warnings not to do anything that would
work harden it. Possibly more because it will gall and also because
it does not conduct heat well. So it sounds as if you can't harden
titanium much by work hardening, you need to machine it as if it does
work harden.

Dan

In the sense that it's not easy to machine, I suppose that's true. But
again, I remember it being tough and requiring a lot of power to cut, not
that it's hard. The maximum hardness you can get with titanium alloys, IIRC,
is in the range of Rc 40.

I'm sure there's good info on machining it around the Web. I just haven't
looked. The public-transportation guys have been keeping me busy. d8-)

--
Ed Huntress