Adding a reference of the elements inside a row, so you can programmatically remember how to access a certain label or image. To use this app: create a new project in Ti Studio, using a classic titanium project, copy this to app.js and run it in emulator. Check the "try to print a custom value in the row". That's the way you will be able to acce…

app.js

var win = Ti.UI.createWindow({
  backgroundColor:'white',
});

var tableData = [];

for (var i=1; i<=20; i++){
  var row = Ti.UI.createTableViewRow({
    className:'forumEvent', // used to improve table performance
    selectedBackgroundColor:'white',
    rowIndex:i, // custom property, useful for determining the row during events
    height:110,
    avatar: null,
    username: null,
    details: null, 
  });
  
  var imageAvatar = Ti.UI.createImageView({
    image: 'KS_nav_ui.png',
    left:10, top:5,
    width:50, height:50
  });
  row.add(imageAvatar);
  row.avatar = imageAvatar; 
  
  var labelUserName = Ti.UI.createLabel({
    color:'#576996',
    text:'Fred Smith ' + i,
    left:70, top: 6,
    width:200, height: 30
  });
  row.add(labelUserName);
  row.username = labelUserName;
  
  var labelDetails = Ti.UI.createLabel({
    color:'#222',
    text:'Replied to post with id...',
    left:70, top:44,
    width:360
  });
  row.add(labelDetails);
  row.details = labelDetails; 
  
  // Try to print a custom value in the row.
  Ti.API.info(row.details);
    
  tableData.push(row);
}

var tableView = Ti.UI.createTableView({
  backgroundColor:'white',
  data:tableData
});

win.add(tableView);
win.open();