"Standard" commercially available terfenol-d has a compressive strength of -700 MPa, a tensile strength of 28 MPa, and a bending strength of about 40 MPa.

Sources:

• Handbook of Giant Magnetostrictive Materials , Page 108
  
  
• Load Capacity of Giant Magnetostrictive Materials

Hardened caps bonded to rod ends have proven to make it more rugged.

In 2023, 20 modern production test specimens were crushed. Each specimen was a right circular cylinder of terfenol-d sandwiched between two hardened end caps bonded on with a compliant bonding agent. Crucially, the terfenol-d and its two end caps were all of the same diameter, 12.3mm. Terfenol-d length was 10mm and each end cap 8mm for a total specimen length of 26mm.

Qualitatively, it was observed that the relatively low Young's modulus of terfenol-d enabled storage of significant energy which manifested as a shower of molten ejecta at failure.

Crush strength was measured to be near the range of 805+/-34 MPa (117+/-5 ksi).