In　this　study,　sodium　hydroxide　was　used　as　an　alkali　reagent　in　roasting　spent　selective　catalytic　reduction　(SCR)　catalysts　for　titanium　extraction.　The　thermodynamic　analysis　of　the　roasting　process　is　discussed　in　terms　of　process　design.　The　effects　of　various　roasting　parameters,　such　as　the　mass　ratio　of　NaOH-to-SCR,　temperature,　and　time,　on　the　extraction　efficiency　of　titanium　were　investigated;　under　the　optimum　parameters　of　1.8:1,　550　degrees　C,　and　10minutes,　the　titanium　extraction　yield　reached　97.8pct.　The　roasting　kinetics　of　titanium　extraction　were　also　studied.　The　kinetics　of　titanium　extraction　follow　the　Avrami　model,　which　is　expressed　as　follows:　-lnt,　and　the　overall　roasting　process　is　controlled　by　diffusion　in　the　solid　state,　with　an　activation　energy　(E-a)　of　4.12kJ/mol.