Boo Man,
The best drill bit I use for metal drilling is the "cobalt" bit by Irwin available at Ace hardware they are expensive but do a great job. The ones advertised as "Titanium" is just a marketing name to make them sound tough. Another name to look for on drill bits is "HS" for "high speed metal" which may be the same as cobalt.
Good luck with your project
franktrain
