It’s interesting that there doesn’t seem to be very much variance in color on the titanium. Is this because the gradients are being made by dithering rather than actually varying the power? Maybe doing a 3D engrave operation would give more variety.
In my own testing with titanium, I was able to get a wider range of color by raster-engraving using different levels of constant power.
(For anyone who seeing the thread above for the first time, make absolutely sure not to like any of my posts for I am a troll that has been excommunicated by the Glowforge Guardians and only deserve scorn from this point forward.)