Mechanical behavior and microstructure evolution of a Ti/TiB metal-matrix composite during multiaxial forging (MAF) at 700 and 850 C and a strain rate 10 À3 s À1 were studied. The composite was produced via in-situ 3Ti þ TiB 2 /2Tiþ2TiB reaction during spark plasma sintering at 1000 C. Mechanical behavior in terms of aggregated s-Sε curves during MAF at both temperatures demonstrated a pronounced softening following by a steady-like flow stage. Microstructure evolution during MAF at both temperatures was associated with (i) dynamic recrystallization of the titanium matrix and the formation of dislocation-free areas of~1 mm in diameter and (ii) shortening of TiB whiskers by a factor of~3. MAF at 700 and 850 C to cumulative strain~5.2 resulted in a considerable increase in the low-temperature ductility without substantial loss in strength. Contributions of different strengthening mechanisms into the overall strength of the Ti/TiB metalematrix composite were discussed.

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