Superconducting Mg(B$_{1-x}$C$_x$)$_2$ with Titanium Additions

We have studied the superconducting properties of Mg(B$_{1-x}$C$_x$)$_2$ up to x$~=~0.021$ with and without 0.5$\% $ titanium impurities to determine the feasibility of simultaneously enhancing both the upper critical field and critical current density via chemical additions. Carbon substitutes for boron, increasing H$_{c2}$ by increasing scattering within the $\pi$ band. Titanium forms inter and intragranular precipitates of either TiB or TiB$_2$, which enhance flux pinning and J$_c$. The two effects appear additive and result in an increase in J$_c$ and H$_{c2}$ values.