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研究了超塑合金Ｔｉ－１２Ｃｏ－５Ａｌ非平衡态β相ａ＋Ｔｉ２Ｃｏ共析转变的时效过程以及它的硬度变化。当温度为４５０℃时，随着时间的增长硬度随之增加，β相的转变也更加完全，转变产物之间以及转变产物与母相之间的相变也从完全共格到半共格再到完全非共格，而峰值发生在３２０ｍｉｎ左右；当时间为２０ｍｉｎ时，随温度的升高也具有相同的规律，峰值发生在６００℃左右。Ａｌ元素除了具有固溶强化的作用之外，还有提高共析相变温度，从而减缓了相转变动力学的进行。
The aging process and its hardness change of non-equilibrium β phase a + Ti2Co eutectic transformation of superplastic alloy Ti-12Co-5Al were studied. When the temperature is 450 ℃, the hardness increases with time, and the transformation of β phase is more complete. The transformation between the transformation products and between the transformation products and the parent phase also changes from completely coherent to semi-coherent To completely non-coherent, while the peak occurs in about 320min; when the time is 20min, with the increase of temperature also has the same rule, the peak occurs at about 600 ℃. Al addition to the role of solid solution strengthening, but also improve the eutectoid transformation temperature, thereby slowing the phase transition kinetics.