No. A Metrobank account which is inactive for 1 year will not be closed. According to one of the Rules and Regulations governing Metrobank Savings Account, a Metrobank account is regarded as dormant if it's inactive (no transactions are performed) for 2 years. So if your account has no transactions in less than 2 years, it is still active. Meaning you can still use the account. The money is still intact.
On the other hand, if your account is inactive for 2 years, Metrobank will charge a corresponding dormancy fee, regardless of account balance. The dormancy fee will be automatically debited from the dormant savings account.
Therefore, to avoid dormancy fee, you should at least perform a transaction (deposit, withdraw, fund transfer, pay bills, etc.) to your Metrobank account?
Are you worried with your inactive Metrobank account?