Degree Requirements for Materials Science & Engineering:
Johns Hopkins University: Department of Materials Science and Engineering
Computer Science Undergraduate Program:
JHU Department of Computer Science
I am not sure of the feasibility of a double major between these programs, but I can see a major/minor if you are really interested in it. Whether it is too overwhelming is an individual assessment based on your interests outside of these programs (i.e. electives). You may want to chat with an Engineering Academic Advisor as they could better assess the requirements for both programs, and provide suggestions tailored to your specific interests.