A quaternary nickel-titanium alloy includes: Ni at a concentration of between about 48 at. % and about 52 at. % Cr at a concentration of from about 0.3 at. % to about 1 at. % Co at a concentration of from about 0.5 at. % to about 2 at. % and Ti at a concentration wherein a ratio of Ni:Ti is about 1.03. According to one exemplary embodiment of the alloy, the concentration of Cr may be about 0.5 at. % and the concentration of Co may be about 0.75 at. %. According to another exemplary embodiment of the alloy, the concentration of Cr may be about 0.25 at. % and the concentration of Co may be about 0.5 at. %.
