White powder, Titanium dioxide occurs in nature as well-known minerals rutile and anatase, Pigment: Titanium dioxide is the most widely used white pigment. TiO2 is also an effective opacifier in powder form, where it is employed as a pigment to provide whiteness and opacity to products such as paints, coatings, plastics, papers, inks, foods, medicines as well as most toothpastes. Opacity is improved by optimal sizing of the titanium dioxide particles.