TiB2/TiAl composite panel and preparation method thereof

The invention discloses a TiB2/TiAl composite panel and a preparation method thereof, relating to a particle-reinforced TiAl based composite panel and a preparation method thereof. The TiAl based composite panel prepared by the invention has the advantages of uniform and fine texture, isotropy, little pollution, higher fracture toughness and high-temperature strength, short preparation period, high use rate of materials and low cost. The TiB2/TiAl composite panel comprises TiB2 and TiAl alloy substrates. The preparation method comprises the following steps of (1) preparing a cast ingot, annealing and hot isostatic pressing; (2) cutting into blocks, polishing the surface, spraying with plasmas, packing and vacuum sealing; (3) rolling panels; and (4) turning to remove wraps, and polishing the surface to reduce the thickness to obtain the TiB2/TiAl composite panel. The TiB2/TiAl composite panel of the invention can be used in wing and casing parts of a superspeed aircraft, and can be also used for manufacturing protective tiles of armors.