What would cause a titanium rod in your back break?

A titanium rod in the back may break due to excessive stress or impact, such as from a fall, accident, or extreme physical activity that exceeds its strength limits. It could also be affected by material fatigue over time, particularly if the rod is subject to repetitive motion or stress. Additionally, improper alignment or complications from the surrounding bone or tissue could contribute to failure. Though titanium is strong, no material is immune to breaking under certain conditions.