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从宏观性能与微观结构角度研究了２０９０＋Ｃｅ铝锂合金的时效过程中的强化和韧化机制。１５０℃时效过程中，延长时效时间可加强层内与层间两种强化机制的作用，从而使合金强度升高，塑性下降。经１５０℃时效和１６３℃时效的合金具有相同水平的拉伸性能，而前者韧性更优，窄的ＰＦＺ和无稳定相存在的晶界以及塑变迹象明显的断口，是其具有高Ｋｃ的主要机制。
The mechanism of strengthening and toughening in the aging process of 2090 + Ce Al-Li alloy was studied from the perspective of macroscopic properties and microstructure. 150 ℃ aging process, the extension of aging time can enhance the role of two layers and layers of strengthening mechanism, so that the alloy strength, plasticity decreased. The alloys aged at 150 ℃ and aged at 163 ℃ have the same level of tensile properties, while the former has better toughness, the grain boundaries with narrow PFZ and unstabilized phases, and the obvious fracture with signs of plastic deformation are the main ones with high Kc mechanism.