Silver nanowire networks are very promising as flexible electrode for organic (opto)electronics. They fulfill the requirement of a low sheet resistance combined with high transmittance and macroscopic bending tests show excellent performance. In order to understand failure mechanisms and prospectively optimize the deformation behavior of AgNW electrodes in situ mechanical testing in the TEM is conducted. In situ tensile tests of single Ag NWs as well as Ag NW networks are conducted in this project in order to perform scale bridging failure analysis