A method of joining wire includes preparing a first discrete region of a first wire at a first end of the first wire. The prepared first discrete region is welded to a component to form a joint such that material of the prepared first discrete region at least partially thickens the joint. The component is one of a second end of the first wire, an end of a second wire, or a non-wire component. The joint may be heat treated according to a three-stage heat treatment process. Mechanical stress may be induced in the joint during the heat treatment so that the joint is subjected to thermo-mechanical processing.
STATEMENT REGARDING FEDERALLY-SPONSORED RESEARCH OR DEVELOPMENT
 This invention was made with Government support under Award No. 25A2034, awarded by Advanced Research Projects Agency-Energy (ARPA-E), U.S. Department of Energy. The United States Government has certain rights in this invention.