We report a high-contrast, high-intensity Ti:sapphire chirped-pulse amplification system that incorporates a nonlinear preamplifier based on optical parametric chirped-pulse amplification (OPCPA). By cooling the Ti:sapphire crystal in the final amplifier down to $77\mathrm{K}$ , the chirped-pulses are amplified to $2.9\mathrm{J}$ at a $10\mathrm{Hz}$ repetition rate without a thermal lensing effect. Pulse compression down to $19\mathrm{fs}$ duration obtained after amplification indicates a peak power of $80\mathrm{TW}$ . With the OPCPA, the temporal contrast is significantly improved to better than $7\times {10}^{-9}$ in a few picoseconds interval prior to the main laser pulse.