Abstract: Using B2O3-TiO2 as an additive, cordierite glass-ceramics with stoichiometric composition were prepared by the sol-gel technique. The sample crystallization was characterized by differential thermal analysis, X-ray diffraction and scanning electron microscope. Effect of doping B2O3-TiO2 on crystallization was investigated. It is shown that α-cordierite is obtained from amorphous compound, with metastable phases of Al-Mg spinel and β-quartz solid solution produced, indicating that the B2O3 retards the crystallization of μ-cordierite. The Ti-rich liquid drops inducing non-uniform nucleation are formed in the glass phase by doping TiO2, which promotes the bulk crystallization of α-cordierite.