Ferroelectric materials, mainly Pb-containing, have widespread applications in our modern-day life, primarily used as sensors, actuator and memories. However challenges still remain to understand the structure-property relations at the atomic level, which is crucial in order to develop bespoke materials with improved qualities, and to find Pb-free alternatives to avoid environmental concerns. Here we aim to investigate a reduced Pb-content ferroelectric system (1-x)PbTiO3 -xBi(Mg1/2Ti1/2)O3, which was first reported in 2004 as a promising high-temperature (Tc ~ 700 K) piezoelectric material, through studying their pair distribution function at ambient and non-ambient temperature with a view to establish categorically the behavior of each cation or a preferred chemical order that impacts the properties of the system. We propose to use GEM for this study, which is a dedicated PDF beamline.