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This work deals with the densification of TNM alloys by spark plasma sintering. Pre-alloyed powders with composition Ti–43.9Al–4Nb–0.95Mo–0.1B (at.%) were sintered between 1237 and 1429 °C, applying a pressure of 100 MPa. The microstructures of the alloys were studied by scanning electron microscopy and transmission electron microscopy. Tensile tests at room temperature and creep experiments at 700 °C and 300 MPa stress were performed. Post-mortem analyses of deformed samples were also carried out by transmission electron microscopy to explain the mechanical properties. Duplex, nearly lamellar and so-called β microstructures were obtained as a function of the sintering temperature. Attention is focused on the nearly lamellar microstructure. This type of microstructure is composed of small lamellar α₂/γ-colonies, which are surrounded by γ + β₀ intercolony borders. It exhibits very strong creep …