Mabili a entsoeng ka ho tjheseletsa ke mabili a entsoeng ka ho tjheseletsa. Mabili a entsoeng ka tsela ena a ka tlosa masoba a ka hare le mapetso ka tekanyo e kholo. 'Me hangata a sebelisoa ka mokhoa oa ho tjheseletsa ka makhetlo a mangata, e leng se ka netefatsang hore ho tlosoa liphoso tse fapaneng tsa thepa, ho eketsa khatello ea kahare ea thepa, 'me ho tiea ho tla ba betere, e leng se ka ntlafatsang haholo khanyetso ea tšusumetso le khanyetso ea ho taboha ka lebelo le phahameng.
Ka mokhoa o tiileng le o nepahetseng oa tlhahlobo ho netefatsa boleng ba sehlahisoa. Tlhahlobo ea liphoso, tlhahlobo ea microscopic ea metallographic, tlhahlobo ea tlhahlobo ea spectral, tlhahlobo ea teko ea ho tensile ea thepa e etsoa ho tloha thepa e tala ho ea fekthering; ho netefatsa hore thepa e tala e tšoanelehang e kena ts'ebetsong ea tlhahiso, taolo ea mocheso oa ho futhumatsa le ho nka sampole ea molamu oa aluminium, taolo ea mocheso oa hlobo ea forging, taolo ea khatello ea mochini oa forging le ho nka sampole; likheo Mocheso oa tharollo ea kalafo ea mocheso, taolo ea mocheso oa botsofali le ho nka sampole; sampole ea boholo bo felletseng le ea boemo ba sehokelo sa ts'ebetso; ho lemoha liphoso tsa 'mala kamora ts'ebetso; tlhahlobo e felletseng ea ponahalo ea sehokelo sa sephutheloana sa sehlahisoa se felileng.
Ha ho bapisoa le mabili a thepa e 'ngoe, boima bo bong le bo bong bo tloaelehileng bo bobebe ho feta mabili a tšepe a boholo bo lekanang, e leng se bolokang peterole; ② A tšoarella, a hanyetsa ho thulana, matla a ho tsitlallela le matla a mocheso li phahame ho feta a thepa e 'ngoe; ③ Tshebetso e nepahetseng ea ho khanna le e leka-lekaneng E ntle; ④ Ho qhala mocheso hantle. Nakong ea ho khanna ka lebelo le phahameng hole, mabili a ka bolokoa mochesong o loketseng, ka hona a lelefatsa bophelo ba ts'ebeletso le ho fokotsa monyetla oa ho phunyeha; ⑤ Ho lelefatsa bophelo ba enjene, ho latela kerafo ea mojaro le matla a enjene, ha mojaro o eketseha ho isa bohōleng bo itseng, matla a eona a tla fokotseha 'me mojaro oa enjene o tla fokotseha, e leng se tla fokotsa ho hloleha ka tlhaho le ho lelefatsa bophelo; ⑥Mabili a motsoako oa aluminium a na le meralo e fapaneng ho ntlafatsa boleng le botle ba koloi.