  Electroweak effects in the $e^+e^- \to t \bar{t}$ annihilation process are
described with taking into account polarization of the initial and final
particles. We investigate the effects of complete one-loop electroweak
radiative corrections and higher-order radiative effects to the total cross
section and analyze different types of asymmetries for polarized initial and
final states for typical energies and degrees of polarization of the ILC and
CLIC projects. Numerical results are obtained with the help of Monte Carlo
tools: the ReneSANCe event generator and the MCSANC integrator.
