NOVELTY - A titanium material is made of titanium (alloy). The titanium material has a surface-oxide thickness of 5-25 nm, and average carbon concentration of 0.032-6 at% at a depth of 100 nm from the most external surface including the oxide layer, an average nitrogen concentration of 0.02-6 at%, and a fluorine concentration of 7 at% or less in oxide. The titanium material has an iron content of 0.001-0.1 mass% and an oxygen content of 0.001-0.05 mass%.    USE - Titanium material is used for separators used in polymer-electrolyte fuel cells (both claimed) of motor vehicles and small-scale electric-power generation systems.    ADVANTAGE - The titanium material has low contact resistance and low ion dissolubility, and provides polymer-electrolyte fuel cells having excellent efficiency and durability.    DETAILED DESCRIPTION - A titanium material is made of titanium (alloy). The titanium material has a surface-oxide thickness of 5-25 nm, and average carbon concentration of 0.032-6 at% at a depth of 100 nm from the most external surface including the oxide layer, an average nitrogen concentration of 0.02-6 at%, and a fluorine concentration of 7 at% or less in oxide. The titanium material has an iron content of 0.001-0.1 mass% and an oxygen content of 0.001-0.05 mass%. The particles of gold, platinum, palladium and/or ruthenium, and electroconductive particles are anchored to the surface-layer portion of the titanium material. The electroconductive particles contain chromium nitride, chromium silicide, vanadium boride, vanadium carbide, vanadium nitride, tantalum nitride, tantalum carbide, tungsten carbide, and/or tungsten nitride. An INDEPENDENT CLAIM is included for manufacture of titanium material.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the polymer-electrolyte fuel cell. (Drawing includes non-English language text)    Polymer-electrolyte fuel cell (1)    Solid polymer film (2)    Catalyst electrode (3)    Carbon paper (4)    Separator (5)