Functional positioning: As a high refractive index material, it is used to deposit titanium dioxide (TiO₂) films to improve the light transmittance, reflectance and damage resistance of optical devices.

• Anti-reflection film and beamsplitter: Reduce the loss of lens reflection and improve imaging clarity (such as camera lenses, microscopes).
• Filters and high reflection films: Used in laser systems and infrared sensors to optimize the optical response of specific wavelengths.
• Special coatings: Glasses anti-glare film, cool light film (energy-saving lighting), automotive glass insulation film.

• Wear-resistant and anti-oxidation coatings: In Ti-Si-C plasma spray coatings, Ti₃O₅ is used as a secondary phase (coexisting with TiC and Ti₅Si₃), which can improve coating hardness (up to 1980 HV) and high temperature oxidation resistance (5 times that of titanium alloys at 800°C).
• Bioceramic modification: Doped in alumina (Al₂O₃) bioceramics, artificial bone or dental implants are made by DLP 3D printing, taking into account mechanical strength (compressive strength increased to 7.07 MPa) and biocompatibility.

• Neutron absorbers: Compounded with rare earth oxides (such as Dy₂O₃, Tb₄O₇) for nuclear reactor control rods, Tb₂TiO₅-Dy₂TiO₅ ceramics are made through high-energy ball milling-sintering process, with low coefficient of thermal expansion (optimized radiation stability).

• Titanium-based alloy strengthening: As an additive to Ti-4Si alloy (accounting for 5wt%), it works with Zr/Y₂O₃ to improve the thermal corrosion resistance and wear resistance of the alloy, and is suitable for high-temperature aero engine components.