"Metals can be bonded together by high velocity collisions in which transient pressure is produced ahead of the collision line. This ""upstream"" pressure results in the formation of a jet which contains the surfaces of each metal and serves to bring together internal material under high pressure. Three types of bond zones@ each completely metallurgical@ may result from such collisions; direct metal-to-metal@ uniform melted layer@ or a mixture of these arranged in a wave pattern. The last of these is preferred for commercial applications. Explosion bonding may be used as a means to clad metal plates or to make certain types of joints. This paper reviews the dynamic conditions required to produce bonding@ the nature of the bond zones@ the utility of explosive bonding for cladding and joining@ and the properties of explosively bonded materials@ particularly those of clad metals."