Abstract: A watch part containing a titanium alloy, the titanium alloy, in mass %, includes: Al: 1.0 to 3.5%; Fe: 0.1 to 0.4%; O: 0.00 to 0.15%; C: 0.00 to 0.10%; Sn: 0.00 to 0.20%; Si: 0.00 to 0.15%; and the balance: Ti and impurities, an average grain diameter of ? phase crystal grains is 15.0 ?m or less, an average aspect ratio of the ? phase crystal grains is 1.0 or more and 3.0 or less, and a coefficient of variation of a number density of ?-phase crystal grains distributed in the ? phase is 0.30 or less.

Abstract: A titanium alloy part is characterized in that it includes, by mass %: Al: 1.0 to 8.0%; Fe: 0.10 to 0.40%; O: 0.00 to 0.30%; C: 0.00 to 0.10%; Sn: 0.00 to 0.20%; Si: 0.00 to 0.15%; and the balance: Ti and impurities, in which: an average grain diameter of ?-phase crystal grains is 15.0 ?m or less; an average aspect ratio of the ?-phase crystal grains is 1.0 or more and 3.0 or less; and a coefficient of variation of a number density of ?-phase crystal grains distributed in the ? phase is 0.30 or less.

Abstract: To provide a titanium sheet excellent in formability and a method for manufacturing the same. A titanium sheet, wherein, when a carbon concentration of a base material is Cb (mass %) and a carbon concentration at a depth d ?m from a surface is Cd (mass %), the depth d (carbon concentrated layer thickness) satisfying Cd/Cb>1.5 is 1.0 ?m or more and less than 10.0 ?m or less, wherein a Vickers hardness HV0.025 at a load of 0.245 N in the surface is 200 or more, a Vickers hardness HV0.05 at a load of 0.49 N in the surface is lower than HV0.025, and a difference between HV0.025 and HV0.05 is 30 or more, wherein a Vickers hardness HV1 at a load of 9.8 N in the surface is 150 or less, and wherein an average interval between cracks generated in the surface when a strain of 25% is given in a rolling direction in a bulging forming process is less than 50 ?m and a depth thereof is 1 ?m or more and less than 10 ?m.

Abstract: A watch part containing a titanium alloy, the titanium alloy, in mass %, includes: Al: 1.0 to 3.5%; Fe: 0.1 to 0.4%; 0: 0.00 to 0.15%; C: 0.00 to 0.10%; Sn: 0.00 to 0.20%; Si: 0.00 to 0.15%; and the balance: Ti and impurities, an average grain diameter of ? phase crystal grains is 15.0 ?m or less, an average aspect ratio of the ? phase crystal grains is 1.0 or more and 3.0 or less, and a coefficient of variation of a number density of ?-phase crystal grains distributed in the ? phase is 0.30 or less.

Abstract: A titanium plate is provided in which a Vickers hardness Hv0.025 at a load of 0.245 N at a surface is 150 or less, and an average length of the profile elements RSm is 80 ?m or less and a maximum height Rz is less than 1.5 ?m, RSm and Rz being as defined in JIS B 0601: 2013. The titanium plate has good surface deformability.

Abstract: A titanium alloy part is characterized in that it includes, by mass %: Al: 1.0 to 8.0%; Fe: 0.10 to 0.40%; O: 0.00 to 0.30%; C: 0.00 to 0.10%; Sn: 0.00 to 0.20%; Si: 0.00 to 0.15%; and the balance: Ti and impurities, in which: an average grain diameter of ?-phase crystal grains is 15.0 ?m or less; an average aspect ratio of the ?-phase crystal grains is 1.0 or more and 3.0 or less; and a coefficient of variation of a number density of ?-phase crystal grains distributed in the ? phase is 0.30 or less.

Abstract: To provide a titanium sheet excellent in formability and a method for manufacturing the same. A titanium sheet, wherein, when a carbon concentration of a base material is Cb (mass %) and a carbon concentration at a depth d ?m from a surface is Cd (mass %), the depth d (carbon concentrated layer thickness) satisfying Cd/Cb>1.5 is 1.0 ?m or more and less than 10.0 ?m or less, wherein a Vickers hardness HV0.025 at a load of 0.245 N in the surface is 200 or more, a Vickers hardness HV0.05 at a load of 0.49 N in the surface is lower than HV0025, and a difference between HV0.025 and HV0.05 is 30 or more, wherein a Vickers hardness HV1 at a load of 9.8 N in the surface is 150 or less, and wherein an average interval between cracks generated in the surface when a strain of 25% is given in a rolling direction in a bulging forming process is less than 50 ?m and a depth thereof is 1 ?m or more and less than 10 ?m.

Abstract: A titanium plate is provided in which a Vickers hardness Hv0.025 at a load of 0.245 N at a surface is 150 or less, and an average length of the profile elements RSm is 80 ?m or less and a maximum height Rz is less than 1.5 ?m, RSm and Rz being as defined in JIS B 0601: 2013. The titanium plate has good surface deformability.

Abstract: An object of the present invention is to provide a titanium plate having high strength and excellent workability. In order to achieve this object, the present invention provides a titanium material having an iron content of 0.60% by mass or less and an oxygen content of 0.15% by mass or less, with the balance being titanium and unavoidable impurities, the titanium material having a worked structure formed by working accompanied by plastic deformation and a recrystallized structure formed by annealing after the working, wherein the titanium material is formed such that the average particle size of crystal grains of the recrystallized structure is 1 ?m or more and 5 ?m or less, and the area of a non-recrystallized part in the cross-sectional area of the titanium material is more than 0% and 30% or less.