Ibyiza byaImiterere y'ibyuma:
Muri rusange, ibyiza byububiko bwibyuma nibi bikurikira:
Ibyuma bifite imbaraga nyinshi mubipimo byuburemere.Kubwibyo uburemere bupfuye bwububiko bwibyuma ni buto.Uyu mutungo utuma ibyuma byubaka ibintu byubaka cyane kubwinyubako yamagorofa menshi, ibiraro birebire, nibindi.
Irashobora guhinduka muburyo bwa plastike mbere yo gutsindwa;ibi bitanga imbaraga nyinshi zo kubika.Uyu mutungo witwa nka ductility.
Ibyiza byibyuma birashobora guhanurwa hamwe nurwego rwo hejuru rwose.Mubyukuri, ibyuma byerekana imyitwarire yoroheje kugeza murwego rwo hejuru kandi mubisanzwe bisobanuwe neza kurwego rwo guhangayika.
Imiterere y'ibyumairashobora kwubakwa hamwe numubano wo murwego rwohejuru hamwe no kwihanganira kugufi.
Gutegura no gutanga umusaruro mubisanzwe birashoboka mubyuma.
Kubaka byihuse birashoboka mubyuma.Ibi bivamo kubaka ubukungu bwubaka ibyuma.
Imbaraga z'umunaniro mwiza nazo zo kubaka ibyuma.
Nibiba ngombwa, ibyuma birashobora gushimangirwa igihe icyo aricyo cyose mugihe kizaza.
Ubushobozi bwakoreshejwe mubwubatsi bwibyuma nabyo nibyiza.