Abstract: Lithium aluminosilicate(LAS) glass-ceramics were prepared using the complex nucleation agents TiO₂/ZrO₂.Effect of nucleating agent compositions on the optical properties of LAS glass-ceramics was investigated.The crystallization kinetics and heat treatment process of LAS glass-ceramics were analyzed as a function of MgF₂ content.When the ratio of TiO₂ to ZrO₂ was equal to 1.5/2.5,the LAS glass-ceramic exhibited the most light in color,and had a relatively low crystallization temperature.The crystallization activation energy and crystallization index were increased with the addition of MgF₂,resulting in the decrease in the crystallization temperatures.The LAS glass-ceramics containing 0.5wt% MgF₂ was found to show the highest transparency.However,phase separation-induced cracks and opacity appeared when the amount of MgF₂ was more than 0.5wt%.With the pre-nucleation temperature increasing,the exothermic crystallization peak in the DTA curves of pre-nucleated samples gradually turn broad and weak,so that the optimal heat treatment temperatures should be taken as the onset temperatures at which broadening of the exothermic peak was observed.