MT state, causing it to straighten (251 K in Figure ). The mechanism proposed here is identical to the operating principle of bimetals, and a similar type of curing by decreases in temperature has been reported for composite materials composed of elastic crystals, metals, and polymers. To confirm the inhomogeneous structural phase transition of the crystal arc near the phasetransition temperature, we performed pinpoint X-ray structural analyses of the crystal arc. Based on the crystal mount pin used to stretch crystals reported by Shi et al., we created a 3D model of a mount pin that could bend the crystal by adjusting a screw (Figure and 3D data in the SI).