Can I disown my Brother due to his bad habit

My mom and dad have both passed away. I have one brother who is around 10 years younger than me; he is currently about 34-35 years old. At one point, after our mother's death, I took him into my rented home/apartment as there was no one else to take care of him. He has bad habits. He would leave the house for 2-5 days and come back with dirty clothes. He uses alcohol, marijuana, and possibly other substances I don't know about. He generally spends time with rickshaw drivers and car mechanics. Now, he is damaging my and my father's reputation by asking people for 20-30 rupees to support his bad habits. Today, a bottle of nail polish spilled on the floor. I bought thinner to clean it up. I woke up around 3 am, as I usually do, and noticed the strong smell of thinner. I was surprised that it could still be so strong after 7-8 hours. I moved towards the living room and saw him inhaling from a handkerchief dipped in thinner. No, I had strong feeling he wont able to change because he don't want it. Previously, he stayed with my stepmother in a government-provided flat that was in my father's name. I asked him to transfer the ownership of the property to both of us, but he refused, saying he would not sign any papers. He insists on having possession of the house and wants to stay there alone. Because of his bad habits, people might exploit him by giving him a small amount of money in exchange for his signature whenever they want. I want to know how I can protect the property and myself. If he takes a private loan, he won't be able to repay it, and he might harm himself due to his bad habits. I don't want anyone in the family to blame me. What steps can I take in such a case?