To provide a method for reinforcing a fiber structure or binding a plurality of fiber structures, while conventional defects are settled.

A porous fiber structure is consolidated by forming deposit of a refractory material therein by partially densifying the fiber structure in such a manner as to bond the fibers of the fiber structure together so as to enable the fiber structure to be handled without deformed, while the major part of the initial pore volume of the fiber structure is made empty, and hard pins are implanted through the consolidated porous structure. A blank is obtained by reinforcing a fiber structure by implanting pins or by bonding consolidated fiber structures together, The bonding is performed by implanting pins.