Titanium improves yield and quality of crops.This paper summarized the beneficial effects of titanium on plant growth,and the mechanism behind titaniums benefits to biochemical process in plants was proposed.The paper demonstrated the change of chemical valence of titanium citrate complex between Ti+4and Ti+3 under exposure to sunlight.It was shown that titanium had strong redox capability and tendency of losing or capturing electron under exposure to sunlight.The characteristics could be utilized by corps to help strength its important biochemical processes,which was also accompanied by various electron transferring processes.