⏰ In A Nutshell
Yes, you can use "Gradually Increase Volume" in [Settings tab > Volume and Sound].
⏰ To Elaborate
If you enable "Gradually Increase Volume" feature, the ringtone volume will start weak and get bigger to the volume you set for the certain amount of time. You can select the time span from 30 seconds to 60 minutes, or can turn it off by selecting "Off."
⏰ Keep This In Mind
Please note that the maximum volume depends on what you set when saving the alarm.