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The 7050Al alloy reinforced with in-situ TiB2 particles (4 wt.%) was synthesized via the controllable metal synthesis process.Effects of TiB2 particles on the microstructure and mechanical properties of the in-situ TiB2/7050 composite were studied.The results showed that the majority of the TiB2 particles distributed uniformly in matrix, with the size ranging from 30 nm to 500 nm.