The electrical resistance increases nearly instantly after applying the tensile stress, suggesting that small stresses may lead to several percental changes in R/R. Regardless of the stripe dimensions, the R/R curves stabilise with a GF=f() plateau for  between 0.008 and 0.020, subsequently increasing again until a break appears. The appearance of the plateau region is connected with the CB-PLA material yielding. Pure, insulating PLA has a higher degree of crystallisation, which converts to higher flexural strength of the samples than CB-PLA composites. As a result, it remains in the elastic region as the primary phase, while CB-PLA deforms plastically at lower stress levels. Resistance measurement refers only to conductive paths and shows CB-PLA composite plasticisation, while the stress-strain curve of the whole sample, predominantly composed of PLA, is still in its quasi-elastic range.