By way of a demonstration, these two wound together easily but within a few turns seized solid. Reversal and brute force resulted in this:

The simple application of an anti-sieze compound, such a copperslip, would have prevented this happening since it creates a dissimilar material barrier between the s/s components.
How did I do this? Simple: working too fast and forgot to grease the last bolt as I was working my way around the roof bars

Every day's a school day!