Ingilazi eqinile noma ingilazi eqinile, yenziwa ngokufudumeza ingilazi efakwe emanzini ezingeni lokushisa cishe elingu-650 °C(1200°F) bese ipholiswa ngokushesha ngomoya.Le nqubo ikhiya ingaphandle lengilazi ekucindezelekeni okwandisa kakhulu amandla engilazi.Uma isifuthelene ngokugcwele le ngilazi icishe ibe namandla ngokuphindwe kane kunocezu lwengilazi ene-anneal.
Okubaluleke nakakhulu, uma ikhefu elithukuthele lihlukana libe yizicucu ezincane ezithathwa njengephethini ephephile.