1. THE METHOD OF FUSION-PRESSURE JOINING ALUMINUM ELECTRCAL CONDUCTOR MEMBERS COMPRISING PROVIDING A SMOOTH SURFACE ON THE MEMBERS AT THE INTERFACE WHERE THE MEMBERS ARE TO BE JOINED, PROVIDING A RELATIVELY SMALL AMOUNT OF CUPROUS METAL AT THE INTERFACE, ASSEMBLING THE MEMBERS IN JOINT RELATIONSHIP, RAPIDLY HEATING THE JOINT TO A TEMPERATURE AT LEAST HIGH ENOUGH TO PRODUCE ALUMINUM-COPPER EUTECTIC ON THE SURFFACE OF SAID MEMBERS BUT LEAVING A SUBSTANTIAL PORTION OF THE MEMBERS IN THE SOLID STATE, APPLYING SUFFICIENT PRESSURE TO THE JOINT TO EXPEL SUBSTANTIALLY ALL OF THE LIQUID EUTECTIC FROM THE INTERFACE OF THE JOINT AND DEFORM THE MEMBERS AT THE INTERFACE AND THEREAFTER COOLING THE JOINT.