Final answer:
Ivan IV, also known as Ivan the Terrible, was crowned tsar of Russia. He was the first to declare himself Tsar of all the Russias and is known for his expansionist policies and annexation of territories.
Step-by-step explanation:
Ivan IV, also known as Ivan the Terrible, was the tsar of Russia when he was crowned. He ruled from 1547 to 1584. Ivan IV was the first to declare himself Tsar of all the Russias and he was known for his expansionist policies, annexing the khanates of Kazan, Astrakhan, and Siberia. He also recruited Cossacks to colonize Siberia.
Keywords: Ivan IV, Tsar of Russia, expansionist policies, khanates, annexation, Cossacks, colonization