NOVELTY - Process for making a mesoporous oxide of titanium, comprises: precipitating an ionic porogen and a hydrolyzed compound comprising titanium; and removing the ionic porogen from the precipitate to recover a mesoporous oxide of titanium (where the ionic porogen produces a mesoporous oxide of titanium having a pore volume of at least about 0.5 cc/g and an average pore diameter of at least about 200 Angstrom).    USE - The invention deals with the process for making a mesoporous oxide of titanium. (I) is useful as a catalyst or catalyst support, a nanoparticle precursor, an optical device or an electronic device; and in a photovoltaic cell or in a lithium battery anode. The oxide of titanium is useful in a thermoplastic composition or in a protective coating composition (all claimed). The metal oxide is useful in plastics, protective coatings, optical devices, electronic devices, photovoltaic cells or battery anodes, specifically, lithium-battery anodes. The titanium dioxide particles are useful in products that degrade upon exposure to UV light energy such as thermoplastics and surface coatings. The mesoporous titanium oxide is useful in e.g. coating formulations such as sunscreens, cosmetics, automotive coatings, wood coatings, and other surface coatings; chemical mechanical planarization products; catalyst products; photovoltaic cells; plastic parts, films, and resin systems including agricultural films, food packaging films, molded automotive plastic parts and engineering polymer resins; rubber based products including silicone rubbers; textile fibers, woven and nonwoven nonwoven sheets products; ceramics; glass products including architectural glass, automotive safely glass, and industrial glass; electronic components; and other uses associated with photo and chemically passivated titanium dioxide.    ADVANTAGE - The control of particle microstructure allows control of physical and electronic properties.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for:    (1) a process for making a mesoporous oxide of titanium, comprising: precipitating an ionic porogen and a hydrous oxide of titanium from a reaction mixture comprising a titanium starting material, a base and a solvent (where the titanium starting material and/or the solvent are a source of the anion for the ionic porogen and the base is the source of the cation for the ionic porogen); and removing the ionic porogen from the precipitate to recover a mesoporous oxide of titanium having a pore volume of at least about 0.5 cc/g and an average pore diameter of at least about 200 Angstrom;    (2) a process for making a mesoporous oxide of titanium, comprising: forming a mixture of a solid hydrolyzed starting material comprising titanium and a liquid medium; adding a halide salt to the mixture to saturate the liquid medium of the mixture; recovering the solid from the saturated liquid medium (where the solid comprises a hydrolyzed intermediate comprising titanium having pores containing the saturated liquid medium); and removing the saturated liquid medium from the solid to recover a mesoporous oxide of titanium having a pore volume of at least about 0.5 cc/g and an average pore diameter of at least about 200 Angstrom; and    (3) a composition (I) of matter comprising mesoporous oxide of titanium having a micro structure characterized by a surface area of at least about 70 m2/g, a pore volume of at least about 0.5 cc/g and an average pore diameter of at least about 200 Angstrom; and crystalline mesoporous oxides of titanium made by the processes .