Segmentation by type classifies nano‑TiO₂ into anatase, rutile, mixed‑phase, and doped variants, each influencing market size through performance‑cost trade‑offs. Anatase nanoparticles, prized for superior photocatalytic activity under UV illumination, dominate the premium segment, contributing approximately 40 % of value despite higher synthesis costs. Rutile particles, offering greater stability and lower band‑gap energy, serve bulk pigment and coating markets, accounting for about 25 % of sales. Mixed‑phase (anatase‑rutile) formulations balance activity and durability, capturing roughly 20 % of revenue as they are favored in self‑cleaning and water‑treatment applications. Doped TiO₂—incorporating metals (e.g., Fe, Cu) or non‑metals (e.g., N, C)—extends light absorption into the visible spectrum, supporting emerging solar‑driven processes and representing the remaining 15 % of the market, a segment poised for rapid expansion as efficiency demands intensify.