The as-cast single crystal copper bar billet with ?16 mm was prepared by self-made heated mold horizontal continuous casting equipment

and the as-drawn bar billet with ?12 mm was produced by single-pass cold drawing. The effects of cold drawing on grain orientation and fracture mechanism of single crystal copper were investigated by means of XRD

SEM

combined with tensile tests at room temperature.The results reveal that the cross-section grain orientation of single crystal copper is changed obviously after drawing

exhibiting the increased texture component. The longitudinal-section texture component is remained. However

the volume fraction is varied. The cold drawing has significant influence on the fracture mechanism

which presents as a micropore-dimple aggregation fracture for as-cast specimens

while presents as a micropore growth fracture for as-drawn specimens.