aluminum has damping capacity and energy absorption chara cteristics.However,due to the lower sterngth of aluminum, ists carrying and energy absorption capabilities are Linited. Foamed-aliminum-filledsrtucture can improve the performance.Column shell ratio(R) was proposed,based on which,by nymerical simulation, the transient energy absorpption characterisitics of low density Duocel foamed-aluminum-filled thin wall square titanium energy absorption characteristics of low density Duocel aluminum foam-filled thin wall square titanium pipe and circular titanium pipe were investigated under 30m/s uniform velocity impact loading. The specific energy absorption of Duocel aluminum foam-filled square pipe is ES(F+P)A=0.438J; circle pipe is EC(F+P)A=0.344J. Energy absorption ability of Duocel fomed-aluminum-filled square pipe is better than that of circular pipe. The former is 1.273 times as much as the latter. The deformation mode and mechanical characteristics of foamed-aluminum column and pipe will be altered under mutual interaction and contraints. Buckling wavelength of square pipe well becomes shorterand the case is; just the contrary for circular pipe. The force-displacement curves and mechanicsal behaviors of famed-akunubum column and pipe are similar after agglutinated.