A multi-functional material having a carbon doped titanium oxide layer which contains the carbon being doped in the state of a Ti-C bond, and is excellent in durability (high hardness, scratch resistance, abrasion resistance, chemical resistance, heat resistance) and also functions as a photocatalyst being responsive to a visible light; and a method for producing the multi-functional material, which comprises subjecting the surface of a substrate at least the surface layer of which comprises titanium, a titanium alloy, a titanium alloy oxide or a titanium oxide to a heat treatment in an atmosphere of a combustion gas from a gas containing a hydrocarbon as a primary component or an atmosphere of a gas containing a hydrocarbon as a primary component, so as for the surface to have a temperature of 900 to 1500°C, or exposing said surface of the substrate directly to a combustion flame from a gas containing a hydrocarbon as a primary component to treat the surface with heat so as for the surface to have a temperature of 900 to 1500°C.