Hi guys. My laser is a 450/4500 quasi continuous mode fiber. That means it's 450 watts continuous or up to 4500 watts when pulsed at a 10% duty cycle. Mine can cut through 1/4" titanium, but I have a laser head with pressurized argon to get through it. I don't think it would work with a galvo to get through it. The laser doesn't ablate the material like an engraving laser; it makes it molten and the assist gas blasts it through the material. I think it would simply just melt back in place if a galvo was used. I've tried experiments with engraving with the laser, and it always seems to come down to manipulation of molten metal. You will get a clean engrave in one direction, but the metal blasts out the other direction on a second cut, as it pushes molten metal back to the place you first engraved. It always ends up looking sloppy because of that.
When I cut through material, I normally get a good cut on the sidewalls, but there is always dross on the back side of the cut that needs to be knocked off. In titanium, the material gets hardened, so it's tough to simply sand off, but knocking it off with a file first works fine.
Here's a titanium ring that was made from 4 rings, laser cut, then laser welded.
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ULS 135 watt w/rotary, Mazak QT-6T CNC lathe, Dapra machining center, Sherline CNC, Tormach CNC, Acad, Rofin welding laser, YAG laser w/ rotary, 4500 watt Fiber laser
Boone Titanium Rings