These bars were on my Supercaliber when I picked up. They have a Ti finish, but weigh a ton. They've been cut down to 52cm wide and weigh 308g.
They have what looks like a 'POW...' on one side (could be 'Powerbulge'?) and a '...A..." with what could be '...PAN...' underneath. So I'm thinking SR SAKAE Japan - right era and look similar to what I've found googling.
From the weight I thought they were steel, and was going store them in a 'safe place for a long time', but then curiosity got the better of me and I tried sticking a fridge magnet to them but it just slid off!
What are they made of if a magnet won't stick?
[size=67]90 Trek 1420
91 Gary Fisher Supercaliber
94 Diamond Back Axis
98 Norco Sasquatch
02 LeMond Zurich
06 Pinarello Galileo