Shape memory alloys have applications including actuation in safety devices and medical implants; which is a typical application mentioned?

• A. Fire alarm systems
• B. Automotive tires
• C. Cookware handles
• D. Insulation materials

Answer: (A)

Shape memory alloys act as compact actuators that respond to temperature changes by changing shape, delivering controlled motion with little power and in a small package. That makes them well suited for safety-related actuation where a quick, reliable response is needed without bulky motors. In fire alarm systems, a heat-triggered SMA can drive a switch or mechanism to initiate an alarm or safety release, which is a common example of how SMAs are used in safety devices. The other options don’t rely on this actuator capability: tires depend on elastomeric materials, cookware handles are usually made from conventional metals or plastics for heat resistance and strength, and insulation materials focus on thermal resistance rather than lighting or triggering mechanical actions. So fire alarm systems represent the typical application referenced.