Low cost and highly practical for most applications. Brittle as a result of large grain size, structure, and abnormal anisotropy [10]
Iron-based
Low-cost, good mechanical properties, usable in high-temperature applications, very workable [9]. Low recoverable strains, poor corrosion resistance, requires additions to the alloy matrix [7]
Nickel-titanium
Outperform iron and copper alloys, most commonly used [11]
