TA15 钛合金是航空大型结构件的关键材料。 热等静压(hot isostatic pressing, HIP)技术是实现高性能粉末钛合金近净成形的有效途径，但 HIP 过程中显微组织的粗化常导致强塑性匹配失衡。 本研究旨在探究 HIP 工艺参数对粉末 TA15 合金组织演变与拉伸性能的影响规律，为工艺窗口优化提供理论支撑。 针对粉末冶金 TA15 合金 HIP 过程中组织粗化与性能失衡问题，系统研究了温度(890~980 ℃)和保温时间(2~6 h)对其微观组织及拉伸性能的影响。 结果表明，所有试样均 实 现 全 致 密 化 ，但组 织 演 化 过 程 主 要 受 HIP 温度 控 制 。 低温(890 ℃)下存 在 明 显 原 始 颗 粒 边 界(priorparticle boundaries, PPBs)，形成细小网篮 α 组织，对应较高屈服强度(966 MPa)。随着温度升高，PPBs 逐渐消失，α 相板条及其片层集束显著粗化，导致强度持续下降；当接近 β 转变温度(980 ℃)时，β 相含量增加，组织演变进一步削弱力学性能。 相比之下，保温时间主要影响组织粗化程度，对性能影响较弱。 综合分析表明，920 ℃-120 MPa-4 h 条件下可获得较优的强-塑性匹配。

TA15 titanium alloy is the key material of large aviation structural parts. Hot isostatic pressing (HIP) technology is effective for realizing near net shape formation of high-performance powder titanium alloys. However, the coarsening of the microstructure during the HIP process often leads to an imbalance between strength and plasticity. The purpose of this study is to explore the influence of HIP process parameters on the microstructure evolution and tensile properties of powder TA15 alloys to provide theoretical support for the optimization of the process window. To address the issues of microstructure coarsening and performance imbalance during hot isostatic pressing (HIP) of powder metallurgy TA15 alloys. The effects of temperature (890~980 ℃)and holding time (2~6 h) on the microstructure and tensile properties of the samples were systematically investigated. The results indicate that all the samples achieve full densification, whereas the microstructure evolution is governed primarily by the HIP temperature. Distinct prior particle boundaries (prior particle boundaries, PPBs) are present at a low temperature (890 ℃ ), forming a fine basket-weave α microstructure, which corresponds to a relatively high yield strength (966 MPa). As the temperature increases, the PPBs gradually disappear, whereas the α laths and their colony structures coarsen significantly, leading to a continuous decrease in strength. When the temperature approaches the β-transus (980 ℃ ), the β phase fraction increases, leading to further weakening of the mechanical properties. In contrast, the holding time affects mainly the degree of microstructure coarsening but affects the mechanical properties. Comprehensive analysis reveals that optimal strength-ductility synergy can be achieved under the conditions of 920 ℃-120 MPa-4 h.