Acetone cyclic triperoxide (ACTP) was formed over titania-incorporated mesoporous material catalysts from a mixture of acetone and hydrogen peroxide under a mild and acid-free condition. Fort-nation of ACTP was confirmed by single-crystal X-ray crystallography. The formation of ACTP could be observed in this study because of using the catalyst with a large amount of titania-incorporation at 23 wt.% and its large pore size.