  Nuclear matter under extreme conditions can be investigated in
ultra-relativistic heavy-ion collisions. The measurement of transverse momentum
distributions and yields of identified particles is a fundamental step in
understanding collective and thermal properties of the matter produced in such
collisions. The ALICE Experiment results on identified charged hadron
production are presented for pp collisions at \sqrt{s} = 0.9, 2.76 and 7 TeV
and for Pb-Pb collisions at \sqrt{s_{NN}} = 2.76 TeV. Spectral shapes,
production yields and nuclear modification factors are shown and compared to
previous experiments and Monte Carlo predictions. The spectral shapes in Pb-Pb
collisions indicate a strong increase of the radial flow velocity with respect
to RHIC energies, which in hydrodynamic models is expected as a consequence of
the increasing particle density. The observed suppression of high transverse
momentum particles in central Pb-Pb collisions provides evidence for strong
parton energy loss in the hot and dense medium.
