In order to grasp the regulation law of existing shape control means and to provide reasonable control strategy to solve the problem of double-rib wave, the problem of double-rib wave occurred frequently and was difficult to control when Sendzimir 20-high rolling mill rolled wide industrial pure titanium strip,Based on ABAQUS finite element software and considering the anisotropic mechanical characteristics of commercial pure titanium strip rolling, an integrated roller-strip model of 20-high rolling mill for realizing the dynamic rolling process of work roll and strip was established., and the calculation accuracy of the model is verified by the actual industrial rolling data. The model is used to simulate the single and combined shape control characteristics of wide industrial pure titanium strip rolled by 20-high rolling mill. The results show that the thickness of 75-300 mm from the edge decreases most significantly with the increase of roll channeling when the backup roll 1 # and 7 #, 2 # and 6 #symmetrical position subsection pressing is combined with the middle cone roll channeling roll, which will lead to or aggravate the double-rib wave; the combination of 3 # and 5 #, 4 # symmetrical position subsection pressing and the middle cone roll channeling can alleviate the problem of the two rib waveform, and it is also found that the adjustment of the middle cone roll channeling can not solve the problem of the double-rib wave.Finally, combined with the shape control characteristics of 20-high rolling mill, a piecewise reduction combination scheme is proposed, which can reduce the compressive stress in the double-rib wave zone,Industrial experiments show that the compressive stress in the double-rib wave zone decreases by 60% after the implementation of the piecewise reduction combination scheme, which effectively alleviates the double-rib wave defects when rolling wide titanium strip on 20-high rolling mill.#$NLKeywords: sendzimir 20-high mill; wide commercial pure titanium strip; high-order buckle; finite element; shape control characteristics;