Review of Research Progress on Microtexture of near-α and α + β Two-phase Titanium alloys

Near-α and α + β two-phase titanium alloys are core materials in key engineering fields of aerospace. Improving the performance of titanium alloy forgings, especially the performance stability of large forgings, has always been a research hotspot in the engineering field. However, micro-textures are widespread in titanium alloy forgings, which seriously reduce key properties such as fatigue of the forgings and are one of the key factors restricting the comprehensive performance of titanium alloy forgings. Optimizing the hot working process to improve the uniformity of the crystal orientation distribution of materials is a feasible means to further enhance the performance of alloys.

During his tenure at the Institute of Metal Research, Chinese Academy of Sciences, Researcher Zhao Zibo from Xigong Titanium Yuhua Research Institute conducted systematic research on the crystal orientation of high-temperature titanium alloys and the micro-texture control technology of large-sized bars and forgings, achieving a series of research progress. Recently, based on relevant research results and years of engineering experience, the author has conducted a systematic review of the microtexture of near-α type and α + β two-phase titanium alloys.

This article takes the optimization of titanium alloy forging process, the control of crystal orientation uniformity and the improvement of mechanical properties as the entry points, introduces the definition, characteristics, hazards, causes and potential negative impacts of microtexture, and discusses its control measures. The author also looks forward to the research directions for improving the microstructure uniformity of titanium alloy forgings. This article is concise and precise in language, and its content progresses from simple to complex, making it suitable for professionals at all levels in related fields to read.

The relevant research results were published in Acta Metallurgica Sinica under the title "Review: Microtexture of Near-α and α + β Two-Phase Titanium Alloys". Researcher Zhao Zibo is the first author and co-corresponding author of the paper. This work was supported by the National Major Science and Technology Project.

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