High-speed resistive switching was observed in a TiO2/TiN nano-crystal line thin film sandwiched between platinum electrodes. A low resistance state was achieved by applying a single negative 2.0-V amplitude 20-ns wide electric Pulse, while a high resistance state was achieved by applying a single positive 2.2-V amplitude 30-ns wide electric pulse. So-called forming process, heating bit material by Current flow to form conductive filament path before the resistive switching operation was not required. There was ail approximately 40,000% increase in resistive change that was repeatedly obtained in the system.