For drill bits, I would suggest Cobalt containing high-speed steel.
I use diamond impregnated files, but the cheapo ones. The books you
should read are about machining, not jewelry making.
Be careful, titanium is HIGHLY flammable. The small chips and dust
formed in the machining process, and high heat that can be formed
from a dull tool or too fast of a cutting speed, can cause some
spectacular fires. Titanium is the only metal that can burn in a
pure nitrogen (as well as oxygen) environment. If a fire starts DO
NOT DOUSE WITH WATER, use granulated salt or sand to suffocate the
flame. Dousing burning titanium with water causes the titanium to
react and create titanium oxide with residual hydrogen gas
production, which you definitely do not want when something is
burning. Keep a fire extinguisher handy for all of the other stuff
that will catch fire after the titanium has burned itself out.
The bulk form of titanium in rods, tubing, sheet, etc. is not
flammable unless provoked well beyond the limits of simple jewelry
Daniel J. Statman, Statman Designs