Here's why:

* Excellent whiteness and opacity: TiO2 provides the highest level of whiteness and hiding power, meaning it can cover darker colors effectively.

* Durability and resistance: TiO2 is highly resistant to fading, chalking, and discoloration, making it a long-lasting pigment.

* Versatility: TiO2 can be used in various types of paint, including oil-based, latex, and water-based paints.

While TiO2 is the dominant white pigment, some other oxides might be used in specific paint applications:

* Zinc oxide (ZnO): Used as a less expensive alternative to TiO2, but it offers lower hiding power and may not be as durable.

* Lead carbonate (PbCO3): Formerly used as a white pigment, but its use has been largely discontinued due to its toxicity.

Therefore, titanium dioxide (TiO2) remains the primary and most widely used oxide for achieving brilliant white color in paints.