To realize a material having appropriately gentle ups and downs on the surface, inexpensively in a short time, by subjecting a blasted base material to a high-energy process.

After the surface 2 of a base material 1 is blasted, the surface 5 of the intermediate 4 after the blasting is subjected to a high-energy process selected from among electron beam, laser and plasma processes. An application of an electron beam process e.g. melts and then solidifies the surface 5, in a short time, in a large numbers of sharp concaves 6 and a large number of convexes 7 formed on the surface 5 of the intermediate 4 through the blasting, thus giving a material 9 having gentle ups and downs in which there are a large number of gentle troughs 11 and a large number of gentle crests 12 on the surface 10.