TC4 titanium alloy plate sample was treated through β single phase zone heat treatment and α-β single/double heat treatment to obtain basket-weave microstructure with the staggered α beam domains and the strip α phase with moderate aspect ratio.The results show that the microstructure transforms from widmanstatten structure to acicular martensite structure with the increase of solution cooling rate after the high temperature solution heat treatment in β phase zone.Subsequent results of α-β single/double heat treatment demonstrate that the basket-weave microstructure with staggered α beam domains and relatively uniform α lamellar can be achieved via 1020℃/1 h,AC,960℃/1 h,FC and 900℃/1 h,AC triple heat treatment.And the high micro-hardness structure can be obtained by 1020℃/1 h,WQ,960℃/1 h,FC and 900℃/1 h,AC heat treatment.
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