Hope you are looking to achieve the below.
mainAxisAlignment: MainAxisAlignment.center,
Here is a detailed example class,
class Welcome extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Text('Title Text'),
Text('Description Text'),
],
),
)
);
}
}
Thanks,
Srikanth