Titanium dioxide is the best adhesive in enamels, the products treated by TiO2 will get more lubricous, and have better acid resistance, of course, have better appearance, and luster.
The FDA says that titanium dioxide as a food additive, the food-grade stuff, doesn't exceed – if it doesn't exceed 1 percent of the food's weight, then it's all fine and dandy.
So, it's good to use your brain, but also, you know, know, like, There's no smoking gun here that says, yes, titanium dioxide is going to wreck your liver and give you cancer.
But, as the Titanium Dioxide Manufacturers Association points out, food-grade titanium dioxide called E171, it can't have more than 40% of titanium dioxide to it, in the nanoparticles, I should say.