Abstract <p>We investigated the structural-phase state and mechanical properties of a TiNi-based alloy, obtained by electron beam wire-feed additive manufacturing on titanium and titanium nickelide substrates. It was shown that the printed samples have a heterogeneous coarse-grained microstructure. At room temperature, the obtained samples have the structure of the high-temperature B2-phase of TiNi and the secondary Ti₂Ni (or Ti₄Ni₂O_<i>x</i>) phase. It was found that the printed samples on the Grade 2 substrate failed brittlely during testing. The printed samples on Ti_49.8Ni_50.2 (at %) substrate were plastically deformed and demonstrated pseudoelasticity plateau. It is shown that the value of mechanical properties correlates with the content of Ti₂Ni (or Ti₄Ni₂O_<i>x</i>).</p>