  The production of ${\rm\Xi}^-$ and ${\rm\Omega}^-$ baryons and their
anti-particles in Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 2.76 TeV has been
measured using the ALICE detector. The transverse momentum spectra at
mid-rapidity ($|y| < 0.5$) for charged $\rm\Xi$ and $\rm\Omega$ hyperons have
been studied in the range $0.6 < p_{\rm T} < 8.0$ GeV/$c$ and $1.2 < p_{\rm T}
< 7.0$ GeV/$c$, respectively, and in several centrality intervals (from the
most central 0-10% to the most peripheral 60-80% collisions). These spectra
have been compared with the predictions of recent hydrodynamic models. In
particular, the Krak${\'o}$w and EPOS models give a satisfactory description of
the data, with the latter covering a wider $p_{\rm T}$ range. Mid-rapidity
yields, integrated over $p_{\rm T}$, have been determined. The hyperon-to-pion
ratios are similar to those at RHIC: they rise smoothly with centrality up to
$\langle N_{\rm part}\rangle$~150 and saturate thereafter. The enhancements
(yields per participant nucleon relative to pp collisions) increase both with
the strangeness content of the baryon and with centrality, but are less
pronounced than at lower energies.
