Due to its good stability, high electrocatalytic activity and environmental friendliness, ruthenium coated titanium anodes have broad application prospects in the fields of electrolyzed water, cathodic protection and descaling. Among them, the proportion and existing form of ruthenium oxide(RuO2) in the coating is the key to determine its electrocatalytic activity and stability. In the preparation of coated titanium anodes, thermal decomposion is widely used due to its advantages such as simple operation, low cost, and easy industrial production. This paper introduces the application fields of RuO2-TiO2/Ti anodes, which are widely used in the electrolysis industry. The characteristics and effects of RuO2, TiO2 in RuO2-TiO2/Ti anodes are briefly described. The failure causes and preparation processes of RuO2-TiO2/Ti anodes are described. The effects of pretreatment, coating composition ratio, coating solution concentration and sintering temperature on the stability and electrocatalytic activity of titanium electrode prepared by thermal decomposion are reviewed. The future development direction of titanium anode is proposed for the failure of RuO2-TiO2/Ti anode. It is intended to promote researchers in this field to better understand the characteristics of the titanium anode, the cause of failure and how to prepare a coated titanium electrode with excellent performance.