Abstract: Microstructure and shape memory behavior of Ni₅₀Ti₂₅Hf₂₅, Ni₅₀Ti₂₀Hf₃₀, and Ni₅₀Ti₁₅Hf₃₅ (at.%) were investigated. The self-accommodated monoclinic B19′ martensite was found in all studied alloys at room temperature. Transformation temperatures increase with increasing Hf content. Uniaxial constant-force thermal cycling test reveals that NiTiHf alloys can exhibit reversible shape memory behavior up to ∼800 °C. The work output decreases with increasing operating temperatures due to the dominance of creep mechanisms.