The specific features of the formation of an interface between adhered materials during the formation of layered composite materials by explosive welding can be explained by the theory of self-organization in open systems. If such an interface is considered as an open system, its evolution during the intensification of a welding regime can be explained by self-organization. A further intensive external impact (shear under high pressure) tends to destroy the structure formed due to the self-organization of an interface under explosive welding and to create a new structure.