AbstractWe present a temperature‐controlled scanning probe microscopy characterisation of morphology and mechanical behaviour of conducting N,N′‐cyclized pyrazolium salts. These salts are plastic crystals belonging to the pyrazolium trifluoromethanesulfonimide family. Going from a five‐membered to a seven‐membered ring, and adding a methyl group in α to either the five‐membered or six‐membered rings, allows modulation of the temperature of the phase transitions. Before and after the transitions, the materials' Young moduli, hardnesses and surface roughnesses change. We attribute these macroscopic modifications to specific states: brittle, elastoplastic and viscoplastic, corresponding to variations in the extent of the dislocations present in the crystal lattice planes of the compounds.