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利用光镜、金属薄膜电子显微分析技术、碳萃取复型电子显微分析技术、系列Charpy冲击试验等对Ti微合金钢模拟粗晶区的组织及韧性进行了研究结果表明，随着800-500℃冷却时间的增加，该区域原始奥氏体（γ）晶粒长大并不严重；二次组织由上贝氏体为主逐渐转变为针状铁素体为主；珠光体的形态由非层片相间变为层片相间；M-A组元由条状变为块状，且数量减少，因此韧性得以提高．电子衍射及EDX分析还表明，该区域中的第二相粒子主要为TIN，亦有少量MnS，Ti3Al和AlN等．
The microstructure and toughness of Ti microalloyed steel were simulated by light microscopy, metal thin film electron microscopy analysis, carbon extraction complex electron microscopy analysis and Charpy impact test. The results show that with the increase of 800- The initial austenite (γ) grain growth is not serious in this region due to the increase of cooling time at 500 ℃. The secondary structure mainly changes from upper bainite to acicular ferrite. The morphology of pearlite Non-lamellar phase into interlaminar phase; MA components from bar to block, and the number decreases, so the toughness can be improved. Electron diffraction and EDX analysis also showed that the second phase particles in the region are mainly TIN, also a small amount of MnS, Ti3Al and AlN.