Thanks Steven 😀
What I like about the TiO2 is it becomes permanently fused into the tile. It can't be wiped off or otherwise scratched away just as with the tiles glaze.
Fun thing is if you look at colored tiles, check the base ceramic from the back. The laser easily can blast away the glaze layer and expose this. A black glazed tile with a light colored substrate can produce neat stuff. Only thing is you can't get any shading (line art/text only)