  The thermodynamic geometry formalism is applied to strongly interacting
matter to estimate the deconfinement temperature. The curved thermodynamic
metric for Quantum Chromodynamics (QCD) is evaluated on the basis of lattice
data, whereas the hadron resonance gas model is used for the hadronic sector.
Since the deconfinement transition is a crossover, the geometric criterion used
to define the \mbox{(pseudo-)critical} temperature, as a function of the
baryonchemical potential $\mu_B$, is $R(T,\mu_B)=0$, where $R$ is the scalar
curvature. The (pseudo-)critical temperature, $T_c$, resulting from QCD
thermodynamic geometry is in good agreement with lattice and phenomenological
freeze-out temperature estimates. The crossing temperature, $T_h$, evaluated by
the hadron resonance gas, which suffers of some model dependence, is larger
than $T_c$ (about $20\%$) signaling remnants of confinement above the
transition.
