A TiN-coated bit becomes a regular bit when the coating is worn or ground off. The quality of the steel underneath can be high or low, just as it can be with a non-coated bit.
Look on McMaster-Carr to see what available options are.
I'm seeing a lot of stuff here, I don't know the answer, but if you want to get answers from really experienced people on this one go to one of the following (preferably both in a cross post) newsgroups:
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