Investigate the recommended cutting feeds and speeds - ditto that of the cutter inserts.
IF you don't CUT titanium, it will work harden and become VERY difficult to cut.
IF you get it too hot, it tends to oxidize (titanium oxide - same stuff used on sand paper) which makes it hard and brittle.
Speeds and feeds are REAL critical. I'd check with your Valenite distritutor - their tech support staff can/will recommend tools, speeds and feeds.
Just be sure you know what alloy you're dealing with when you call.....