The grain growth kinetics of two beta titanium alloys, Ti–4733 and Ti–5553 was studied over a temperature range of 850 ^°C–1000 ^°C. The more stable alloy i.e. Ti–4733, showed a smaller average grain size and slower growth rate compared to Ti–5553 at a same annealing condition. The results showed that the uniformity of grain size decreased initially dawn to a minimum and then increased with increasing temperature. The grain growth exponent (n) and activation energy (Q) were calculated and it was revealed that n is mainly affected by temperature and Q is generally influenced by time. The n value for Ti–4733 was found to be lower than that for Ti–5553 while a higher Q was calculated for Ti–4733. The lower n values and the higher Q were attributed to the solute drag effect and the high Mo content with low diffusivity in Ti matrix.

在850 ^° C–1000  ^°的温度范围内研究了两种β钛合金Ti–4733和Ti–5553的晶粒生长动力学 C.在相同的退火条件下，较稳定的合金Ti–4733与Ti–5553相比，显示出较小的平均晶粒尺寸和较慢的生长速率。结果表明，晶粒尺寸的均匀性最初从黎明到最低降低，然后随温度升高而增加。计算出晶粒长大指数（n）和活化能（Q），结果表明n主要受温度影响，Q一般受时间影响。发现Ti–4733的n值低于Ti–5553的n值，而计算得出的Ti–4733的n较高。较低的n值和较高的Q归因于Ti矩阵中的溶质拖曳效应和高Mo含量和低扩散率。