Compression tests are carried out at room temperature with the as-cast and spark-plasma sintered (SPS) specimens of Ni49.0—Mn28.5—Ga22.5 (at.%) and Ni63—Al37 (at.%) alloys. For both systems, ductility of the SPS compacts increases more than by one order of magnitude. Compressive strength of Ni—Mn—Ga alloy increases from 180—240 MPa for induction melted specimens to 510—815 MPa for spark-plasma sintered specimens, depending on the regimes of processing, and for Ni—Al alloy, from 760 to 1310 MPa. Fracture stress of Ni—Mn—Ga and Ni—Al specimens raise from 185—215 to 1170 MPa and from 790 to 1870 MPa, respectively. The SEM and XRD investigations reveal that sintered samples of both systems have a composite structure, which contains the micron-size metallic particles bound by the binder phase. This phase consists of Ni$_{3}$Al and Al$_{2}$O$_{3}$ phases in case of Ni—Al alloy and consists of MnO with apparently small amount of Ni$_{3}$Ga phase in case of Ni—Mn—Ga alloy. As assumed, this phase strengthens the grain boundaries. This one, in conjunction with reduction of the grain size, the manifold morphology of the Ni—Mn—Ga specimens consolidated from the hollow particles, the presence of extra ductile $\gamma^{'}$-phase in Ni—Al particles, provides the enhancing mechanical properties of alloys fabricated by means of the SPS method.