Strut Rods?

You are referring to "metal fatigue". If you bend a paper clip 10 times, it usually breaks. Depends on how far you stretch it and the type of metal. One cycle won't fatigue a strut rod, especially since the tube material is probably something like "cold rolled steel". Springs are made from rolled steel. The strut rods mainly see tension, such as when the front wheels brake. The only time you might bend them in in normal use would be in going backwards - if you brake hard or a front wheel hits a curb or rut. More likely, a fool attached chains to them.