The thermal stability of Ti14, a new typical α+Ti2Cu burn resistant alloy, after conventional forging and semi-solid forging (SSF) were investigated. The results revealed that under the condition of thermal exposure time no more than 150 h, Ti14 alloy after SSF had higher tensile strength than that of conventional one and the plasticity of the two forging state was similar. Up to 200 h, these two states alloy had similar thermal stability. The Ti2Cu particles distributed in grains uniformly after conventional forging; While in the process of SSF, Ti2Cu phases melted and precipitated on the grain boundaries as banding precipitations during cooling, which formed coarse dimples and few cleavages in microfracture, leading to the change of thermal stability