I have just finished machining some parts from titanium....here is what I found in my efforts.....I had to slow my speeds down, almost in half....use a good coolant/cutting oil, I found that I had to push my bits hard, dont let the tool just sit there if your not pushing it get it out....most of the heat generated in the process goes in the tool, the chips dont extract heat like metal chips do....I used carbide / high speed bits and cobalt drill bits, they have to be sharp or they wont do anything but heat things up..... Also it depends on what variety of titanium you will be machining....I was making my parts from the 6AL-4V which is the hardest to machine.................