"Terry Keeley" tkee(no wrote in message
...
Someone wanted a follow up to this so here you go...

I tried a small bit at the temps. given and it did harden it quite a bit,
it could still be filed (barely) but was noticeably stiffer.

When you say "stiffer," do you mean it acts like a stiffer spring, or that
it has more resistance to permanent bending? Titanium has some strange
properties but you shouldn't notice any difference in springiness (there is
some, but it's too small to detect without careful measurement). However, it
will show more resistance to taking a permanent bend.

Problem is that it warped the thin (0.030") sheet slightly, which isn't
good for the application.

Any idea how I can keep thin sheet flat during the process?

That's always a problem when you quench thin sections of metal. There are
some methods. You might want to check with people who make custom knives.
They ought to know.

--
Ed Huntress