If a soft malleable metal pipe has a bend in it and is then pumped up with high internal static pressure, would this soft metal pipe seek to straighten out or would it simply remain in its bent shape due to pressure acting in many directions. I wonder if the most natural position of a pipe is straightened out, or whether there is no such natural position since the pipe was already bent and that IS its natural position as of then. I would guess that possibly the metal atoms would seek to find the most natural position under pressure. Maybe the most equal atomic surface contact and spacing (as much lack of deformity as possible). I am not sure what the most natural position for a pipe is if it is currently bent, if it has the ability to "reform" due to malleability. Maybe a factor that might affect this, is how recently the pipe was bent. If it had been bent into that shape 5 years ago, or 5 minutes ago. The atoms may have settled over time. (Assume that the pressure is indeed high enough to have any effect, if it could.) For visualization, we could dream of a pipe that was as soft as a garbage bag twist tie.. it would be very very very easy to reform this item. So if a pipe was like that, and subjected to internal pressure, but not enough pressure to burst it, would it straighten out first before trying to burst or expand.