(1) ʻO ka ʻokoʻa ma waena o ka hana wela a me ka hana anu: ʻo ka ʻōwili wela ka hana wela, a ʻo ke kiʻi anuanu ke hana anu.ʻO ka ʻokoʻa nui: ke holo nei ka ʻōwili wela ma luna o ka mahana recrystallization, ke ʻōwili nei ka ʻōwili anu ma lalo o ka mahana recrystallization;ʻO ka ʻōwili anu i kekahi manawa wela, akā haʻahaʻa ka mahana, no ka mea, ke hana ʻia ka hana ma hope o ka ʻōwili ʻana Paʻakikī, inā kiʻekiʻe nā mea e pono ai, pono e hoʻopili ʻia.

ʻO ka ʻōwili anu a me ka ʻōwili wela ka mea maʻamau i nā papa a i ʻole nā ​​ʻaoʻao, aʻo ka huki anu ʻana he mau uwea ʻāpana ʻāpana cylindrical.Eia kekahi, ʻo nā pā wela wela he mau kila me ka ʻoi aku ka nui o ka alloy a me ka ikaika kiʻekiʻe, ʻoiai ʻo nā kila i ʻōwili ʻia i nā kila haʻahaʻa a me nā kila haʻahaʻa.Hiki i ka ʻōwili anuanu ke hoʻonui i ka ikaika a hōʻoia i ka maikaʻi o ka ʻili o ka mea.

ʻOkoʻa ka ʻokoʻa ma waena o ka paipu kila maʻemaʻe ʻole i huki ʻia i ke anu a me ka paipu kila maʻemaʻe i ʻōwili ʻia me nā papa.

Hoʻokaʻawale ʻia nā paipu kila maʻemaʻe i loko o nā paipu kila maʻemaʻe (extruded) a me nā paipu kila liʻiliʻi i huki ʻia (rolled) ma muli o kā lākou ʻano hana hana like ʻole.

Pono e huki pinepine ʻia nā paipu kila huki anu, a pono e hoʻopili ʻia ke koʻikoʻi ma waena o kēlā me kēia kiʻi e hōʻoia i ka holomua o ke kiʻi anu.Mai ka hiʻohiʻona, he liʻiliʻi ke anawaena o nā paipu kila liʻiliʻi liʻiliʻi, a ʻo nā paipu kila ʻole i ʻōwili ʻia me ka nui o ke anawaena.ʻOi aku ka pololei o ka paipu kila maʻemaʻe ma mua o ka paipu kila maʻemaʻe, a ʻoi aku ka kiʻekiʻe o ke kumukūʻai.He liʻiliʻi ka liʻiliʻi o nā paipu liʻiliʻi liʻiliʻi, ʻoi aku ka nui ma lalo o 127mm, ʻoi aku ka kiʻekiʻe o ka pololei o ke anawaena o waho o nā paipu liʻiliʻi i huki ʻia i ke anu, a ʻoi aku ka pōkole o ka lōʻihi o nā paipu liʻiliʻi i ka wela.Ma ke ʻano o ka mānoanoa o ka pā, ʻoi aku ka lōʻihi o nā paipu lihi ʻole i huki ʻia i ke anu ma mua o nā paipu wela ʻole.