Sodium-ion batteries have the potential to meet large-scale energy storage demands due to their low cost and abundance. In recent years, several breakthroughs have been made on cathode materials for sodium-ion batteries, including the recognition of oxygen redox activity. However, finding suitable anode materials for sodium ion batteries remains one of the major challenges given that few materials can reversibly intercalate sodium ions. Of these anode materials, sodium titanates are promising candidates due to their ultra-low voltages, high theoretical capacities, and low cost. However, their intrinsic insulating properties and poor conductivity lead to low initial Coulombic efficiencies and unstable solid electrolyte interphases. Herein, we explore a series of sodium titanates which include sodium nonatitanate, lepidocrocite-structured titanates, and Na₂Ti₃O₇, by using a series of synchrotron characterization techniques to further understand the reduction mechanism. Furthermore, we investigate methods to improve the electrode/electrolyte interfaces in these low potential anodes. We hope to shed light on key factors that affect the reversibility of sodium titanate anodes.