Hoʻokaʻawale ʻia ke kila ʻōwili wela i ke kila kila, ke kila māmā a me ke kila ʻōmole welded.A laila, e like me nā kila like ʻole, e ʻimi i ke kila āu e pono ai, a nānā i ka nui a me ke ʻano o ke kila kikoʻī.He haʻahaʻa ka paʻakikī, ka hana maʻalahi a me ka ductility maikaʻi.He kiʻekiʻe ka paʻakikī o ka pā anuanu, paʻakikī ka hana, akā ʻaʻole maʻalahi i ka deformation, ikaika kiʻekiʻe.He haʻahaʻa haʻahaʻa ka ikaika o nā papa kila i ʻōwili ʻia a maikaʻi ʻole ka maikaʻi o ka ʻili (haʻahaʻa oxidation hoʻopau), akā maikaʻi ka plasticity.ʻO ka maʻamau no ka pā maʻamau, ka pā anuanu, ka ikaika kiʻekiʻe, ka paʻakikī kiʻekiʻe, ka pau ʻana o ka ʻili kiʻekiʻe, ma ke ʻano maʻamau no ka pā lahilahi, hiki ke hoʻohana ʻia e like me ka pā kuʻi.ʻOkoʻa ke kaʻina hana o ka pā kila wela me ka pā kila anuanu.ʻO ka pā kila wela wela ka ʻōwili ʻia ʻana, ʻo ka pā kila i ʻōwili ʻia ʻo ka lumi wela ka palai