Not under normal conditions. The pattern is part of the magnetization, and a patterned magnet keeps it as long as the material keeps its magnetism.
Correlated Magnetics Research's FAQ says an NdFeB magnet naturally loses its magnetism at about 1 percent every 100 years, and that Polymagnets behave exactly the same way. Two things can demagnetize one: sustained heat (CMR cites roughly 130 F to 200 F over about 45 minutes, depending on grade) or a very strong reverse magnetic field, on the order of five times the strength of an NdFeB magnet.
Mechanically, a magnetic joint has no rubbing parts to wear. CMR says its Align Polymagnets perform consistently every time without recalibration or maintenance, and that is the main argument for magnetic latches and detents over spring-and-ball mechanisms.
The realistic failure modes are elsewhere. Uncoated or damaged NdFeB corrodes, so coating damage in a wet environment is the bigger risk. Sintered magnets are brittle and can chip if parts slam together. Adhesive joints can creep. Design out impact, protect the coating, and choose a higher-coercivity grade or SmCo if the part runs hot.
WholeMagnetics, 2026-10-04. Polymagnet facts are taken from Correlated Magnetics Research’s public pages, listed below; vendor performance figures are CMR’s own.