Ball joint failure

The truck in question is an 08 LMM Ex Cab LB 350k plus on the clock and the joints before we installed them looked ok to me and my friend that was there to help who has him self built several 14 and 1 class off road cars and all he said is that they were cheap but nothing more then that .....The shop Big O tire did a great job when the first one broke when the tech was reversing the truck into a spot to park for me to pick up , it was just plain and simple a cheap or all cheap parts so never again and the metal looks just like brand new metal after it beaks ? Not sure how else to describe it ... didnt see any pop metal type look so just looked like cheap metal that broke from china go figure .....ts materiel no one was hurt and thanks for the concern she will be fixed and or both ill be in another .