“…As a result of recent advances in mass spectrometry a growing arsenal of nontraditional mass-dependent isotope systems have been applied to investigate the evolution of the Earth and other terrestrial bodies in the solar system, such as Mg (Teng et al, 2010;Hin et al, 2017), Ca (Simon and DePaolo, 2010;Chen et al, 2019), Fe (Craddock and Dauphas, 2011;Debret et al, 2016), Cr (Bonnand et al, 2016;Schoenberg et al, 2016), V (Prytulak et al, 2013;Prytulak et al, 2016;Sossi et al, 2018) and Ni (Klaver et al, 2020). In particular, analytical advances have enabled increasing application of non-traditional isotopes to study high temperature processes, such as magmatic differentiation, where magnitudes of equilibrium isotope fractionation were generally inferred to be too small to resolve prior to the advent of high resolution MC-ICP-MS (Zhang et al, 2011;Millet et al, 2012;Millet and Dauphas, 2014;Teng et al, 2015;Willbold et al, 2016;McCoy-West et al, 2017;Nanne et al, 2017). Titanium is a refractory lithophile element that is highly fluid-immobile and abundant in igneous rocks.…”