Tus nqi ntawm titanium alloy yog nruab nrab ntawm $ 200 thiab $ 400 rau ib phaus tub rog, thaum tus nqi ntawm cov tub rog titanium alloy yog ob zaug ntau npaum li kim. Yog li, dab tsi yog Titanium? Vim li cas nws thiaj kim heev tom qab kev sib cog tseg? Ua ntej, peb nkag siab txog qhov ntawm titanium. Titanium feem ntau yog los ntawm i ...