This study reports an efficient electroless plating approach using an amino-alcohol precursor to synthesize the oxidation stable copper@silver (Cu@Ag) core-shell nanowires. The synthesized nanowires were characterized by different techniques. The as-synthesized nanowires were used to fabricate transparent flexible electrodes (TFEs) and transparent stretchable heaters (TSHs). The nanowire network on the substrates was sintered using the 5% aqueous solution of H2O2, which welded the nanowires at their junction and strongly attached to the substrate. Therefore, the optical-electrical performance (similar to 13 Omega sq(-1) @ 89% transmittance), oxidation stability, and mechanical flexibility of asprepared TFEs and TSHs were improved to a large extent. In addition, the performance of the TSHs in terms of high-saturation temperature and stability against repeated stretching cycles upon 20% mechanical strain temperature are also enhanced. The overall processing strategy was suitable to synthesize the Cu@Ag core-shell nanowires and to fabricate the stable TFEs and TSHs for modern electronic and thermoelectric devices.