**4. Conclusion**

New technological processes of using titanium oxide concentrates (rutile, ilmenite) as starting materials for titanium alloys production were proposed. The first one is based on mechani‐ cal activation of natural rutile concentrate with milling, which caused the reducing of booster (KClO<sup>4</sup> ) amount around 30% and saving expenses for previous chlorination in subsequent alumi‐ nothermic reductions. Promising steps to replace the KClO<sup>4</sup> could be observed but are still under further investigations. The second process produces synthetic TiO2 (anatase) from mechanically activated ilmenite concentrates treated by pressure leaching in dilute H2 SO4 at 150°C. The third process presents the improvement of the previous one because ilmenite concentrate can be hydro‐ metallurgically processed to synthetic TiO2 by normal leaching in dilute H2 SO4 at 50°C. Ilmenite concentrate has to be pre‐treated by mechanical activation with aluminum as a reducing agent which leads to formation of FeTiO3 /Al agglomerates and a new effective reaction mechanism of leaching. After the separation of iron and aluminum by means of crystallization, it is possible to extract synthetic TiO2 as a raw material for aluminothermic production of titanium alloys.
