Chemistry of titanium metal–organic frameworks (Ti-MOFs) encompasses the linking of various titanium-oxo clusters formed mainly by hydrolysis of titanium precursors and organic linkers. Owing to the high reactivity of such titanium precursors, the crystallites of Ti-MOFs are hardly obtained without applying tricky synthetic approaches. For the past decade, scientists have exhaustedly pursued many methodologies to overcome the synthetic challenges of Ti-MOFs. Achievements are indeed observed. However, challenges remain, which not only hinder the versatility of Ti-MOF chemistry but also limit their applications in photocatalysis. This perspective seeks to concisely summarize the Ti-MOF chemistry and discuss viewpoints of the author on how to promote the diversity of Ti-MOFs. The author hopes that future perspectives of this work will help direct the research in this field.

钛金属-有机骨架（Ti-MOFs）的化学包括主要通过钛前体和有机连接体的水解形成的各种钛-氧簇的连接。由于这种钛前体的高反应性，如果不采用复杂的合成方法，则很难获得 Ti-MOF 的微晶。在过去的十年中，科学家们竭尽全力地寻求许多方法来克服 Ti-MOF 的合成挑战。成绩确实有目共睹。然而，挑战依然存在，这不仅阻碍了 Ti-MOF 化学的多功能性，而且限制了它们在光催化中的应用。该观点力求简明地总结 Ti-MOF 化学，并讨论作者对如何促进 Ti-MOF 多样性的观点。