Zetto handlebars?

BG

Retro Guru
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?
 

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