I like to use titanium also.
I label my carbides as "glass bits". A carry over from helping Gramps make custom gauges. (Talk about hard to cut without a shatter. We'd weight the drill press handle slightly and walk off, checking progress between other work, then fliped it, going in from the other side to avoid edge chips)
They do have titanium saw blades too. 
A grinder is usually my choice for cutting fiberglass though.
