The formation of charge and spin density wave (CDW and SDW) states in metallic systems isdriven by Fermi surface instabilities that are often found to compete with superconductivity. About 6 months ago, superconductivity was discovered in the titanium oxy-pnictide system Ba(1-x)NaxTi2Sb2O which has attracted much attention because of its striking similarities to the Febased superconductors. This material and its analogues show a transition which has been linked to the onset of a CDW or SDW order. In the superconducting samples, suppression of the DW order is linked to enhanced superconductivity. Our objective is to characterise the proposed SDW order in 6g powder samples of non-superconducting Na2Ti2As2O and Na2Ti2Sb2O (Ts = 114K for Sb and 320K for As). These measurements will be followed up by resonant x-ray scattering experiments at Diamond on single crystal samples.